windows/winpos.c

/*
 * Window position related functions.
 *
 * Copyright 1993, 1994, 1995 Alexandre Julliard
 *                       1995, 1996, 1999 Alex Korobka
 */

#include <string.h>
#include "windef.h"
#include "wingdi.h"
#include "wine/winuser16.h"
#include "heap.h"
#include "module.h"
#include "user.h"
#include "region.h"
#include "win.h"
#include "hook.h"
#include "message.h"
#include "queue.h"
#include "options.h"
#include "task.h"
#include "winpos.h"
#include "dce.h"
#include "nonclient.h"
#include "debugtools.h"
#include "local.h"
#include "ldt.h"
#include "input.h"

DEFAULT_DEBUG_CHANNEL(win)

#define HAS_DLGFRAME(style,exStyle) \
    (((exStyle) & WS_EX_DLGMODALFRAME) || \
     (((style) & WS_DLGFRAME) && !((style) & WS_BORDER)))

#define HAS_THICKFRAME(style) \
    (((style) & WS_THICKFRAME) && \
     !(((style) & (WS_DLGFRAME|WS_BORDER)) == WS_DLGFRAME))

#define  SWP_AGG_NOGEOMETRYCHANGE \
    (SWP_NOSIZE | SWP_NOMOVE | SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE)
#define  SWP_AGG_NOPOSCHANGE \
    (SWP_AGG_NOGEOMETRYCHANGE | SWP_NOZORDER)
#define  SWP_AGG_STATUSFLAGS \
    (SWP_AGG_NOPOSCHANGE | SWP_FRAMECHANGED | SWP_HIDEWINDOW | SWP_SHOWWINDOW)

#define EMPTYPOINT(pt)          ((*(LONG*)&(pt)) == -1)

#define PLACE_MIN		0x0001
#define PLACE_MAX		0x0002
#define PLACE_RECT		0x0004

#define SWP_EX_NOCOPY		0x0001
#define SWP_EX_PAINTSELF	0x0002
#define SWP_EX_NONCLIENT	0x0004

#define MINMAX_NOSWP		0x00010000

/* ----- internal variables ----- */

static HWND hwndPrevActive  = 0;  /* Previously active window */
static HWND hGlobalShellWindow=0; /*the shell*/
static HWND hGlobalTaskmanWindow=0;
static HWND hGlobalProgmanWindow=0;

static LPCSTR atomInternalPos;

extern HQUEUE16 hActiveQueue;

/***********************************************************************
 *           WINPOS_CreateInternalPosAtom
 */
BOOL WINPOS_CreateInternalPosAtom()
{
    LPSTR str = "SysIP";
    atomInternalPos = (LPCSTR)(DWORD)GlobalAddAtomA(str);
    return (atomInternalPos) ? TRUE : FALSE;
}

/***********************************************************************
 *           WINPOS_CheckInternalPos
 *
 * Called when a window is destroyed.
 */
void WINPOS_CheckInternalPos( WND* wndPtr )
{
    LPINTERNALPOS lpPos;
    MESSAGEQUEUE *pMsgQ = 0;
    HWND hwnd = wndPtr->hwndSelf;

    lpPos = (LPINTERNALPOS) GetPropA( hwnd, atomInternalPos );

    /* Retrieve the message queue associated with this window */
    pMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( wndPtr->hmemTaskQ );
    if ( !pMsgQ )
    {
        WARN("\tMessage queue not found. Exiting!\n" );
        return;
    }

    if( hwnd == hwndPrevActive ) hwndPrevActive = 0;

    if( hwnd == PERQDATA_GetActiveWnd( pMsgQ->pQData ) )
    {
        PERQDATA_SetActiveWnd( pMsgQ->pQData, 0 );
	WARN("\tattempt to activate destroyed window!\n");
    }

    if( lpPos )
    {
	if( IsWindow(lpPos->hwndIconTitle) ) 
	    DestroyWindow( lpPos->hwndIconTitle );
	HeapFree( SystemHeap, 0, lpPos );
    }

    QUEUE_Unlock( pMsgQ );
    return;
}

/***********************************************************************
 *           WINPOS_FindIconPos
 *
 * Find a suitable place for an iconic window.
 */
static POINT16 WINPOS_FindIconPos( WND* wndPtr, POINT16 pt )
{
    RECT16 rectParent;
    short x, y, xspacing, yspacing;

    GetClientRect16( wndPtr->parent->hwndSelf, &rectParent );
    if ((pt.x >= rectParent.left) && (pt.x + GetSystemMetrics(SM_CXICON) < rectParent.right) &&
        (pt.y >= rectParent.top) && (pt.y + GetSystemMetrics(SM_CYICON) < rectParent.bottom))
        return pt;  /* The icon already has a suitable position */

    xspacing = GetSystemMetrics(SM_CXICONSPACING);
    yspacing = GetSystemMetrics(SM_CYICONSPACING);

    y = rectParent.bottom;
    for (;;)
    {
        x = rectParent.left;
        do 
        {
              /* Check if another icon already occupies this spot */
            WND *childPtr = WIN_LockWndPtr(wndPtr->parent->child);
            while (childPtr)
            {
                if ((childPtr->dwStyle & WS_MINIMIZE) && (childPtr != wndPtr))
                {
                    if ((childPtr->rectWindow.left < x + xspacing) &&
                        (childPtr->rectWindow.right >= x) &&
                        (childPtr->rectWindow.top <= y) &&
                        (childPtr->rectWindow.bottom > y - yspacing))
                        break;  /* There's a window in there */
                }
                WIN_UpdateWndPtr(&childPtr,childPtr->next);
            }
            WIN_ReleaseWndPtr(childPtr);
            if (!childPtr) /* No window was found, so it's OK for us */
            {
		pt.x = x + (xspacing - GetSystemMetrics(SM_CXICON)) / 2;
		pt.y = y - (yspacing + GetSystemMetrics(SM_CYICON)) / 2;
		return pt;
            }
	    x += xspacing;
        } while(x <= rectParent.right-xspacing);
        y -= yspacing;
    }
}


/***********************************************************************
 *           ArrangeIconicWindows16   (USER.170)
 */
UINT16 WINAPI ArrangeIconicWindows16( HWND16 parent) 
{
    return ArrangeIconicWindows(parent);
}
/***********************************************************************
 *           ArrangeIconicWindows   (USER32.7)
 */
UINT WINAPI ArrangeIconicWindows( HWND parent )
{
    RECT rectParent;
    HWND hwndChild;
    INT x, y, xspacing, yspacing;

    GetClientRect( parent, &rectParent );
    x = rectParent.left;
    y = rectParent.bottom;
    xspacing = GetSystemMetrics(SM_CXICONSPACING);
    yspacing = GetSystemMetrics(SM_CYICONSPACING);

    hwndChild = GetWindow( parent, GW_CHILD );
    while (hwndChild)
    {
        if( IsIconic( hwndChild ) )
        {
            WND *wndPtr = WIN_FindWndPtr(hwndChild);
            
            WINPOS_ShowIconTitle( wndPtr, FALSE );
               
            SetWindowPos( hwndChild, 0, x + (xspacing - GetSystemMetrics(SM_CXICON)) / 2,
                            y - yspacing - GetSystemMetrics(SM_CYICON)/2, 0, 0,
                            SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
	    if( IsWindow(hwndChild) )
                WINPOS_ShowIconTitle(wndPtr , TRUE );
            WIN_ReleaseWndPtr(wndPtr);

            if (x <= rectParent.right - xspacing) x += xspacing;
            else
            {
                x = rectParent.left;
                y -= yspacing;
            }
        }
        hwndChild = GetWindow( hwndChild, GW_HWNDNEXT );
    }
    return yspacing;
}


/***********************************************************************
 *             SwitchToThisWindow16   (USER.172)
 */
void WINAPI SwitchToThisWindow16( HWND16 hwnd, BOOL16 restore )
{
    SwitchToThisWindow( hwnd, restore );
}


/***********************************************************************
 *             SwitchToThisWindow   (USER32.539)
 */
void WINAPI SwitchToThisWindow( HWND hwnd, BOOL restore )
{
    ShowWindow( hwnd, restore ? SW_RESTORE : SW_SHOWMINIMIZED );
}


/***********************************************************************
 *           GetWindowRect16   (USER.32)
 */
void WINAPI GetWindowRect16( HWND16 hwnd, LPRECT16 rect ) 
{
    WND * wndPtr = WIN_FindWndPtr( hwnd ); 
    if (!wndPtr) return;
    
    CONV_RECT32TO16( &wndPtr->rectWindow, rect );
    if (wndPtr->dwStyle & WS_CHILD)
	MapWindowPoints16( wndPtr->parent->hwndSelf, 0, (POINT16 *)rect, 2 );
    WIN_ReleaseWndPtr(wndPtr);
}


/***********************************************************************
 *           GetWindowRect   (USER32.308)
 */
BOOL WINAPI GetWindowRect( HWND hwnd, LPRECT rect ) 
{
    WND * wndPtr = WIN_FindWndPtr( hwnd ); 
    if (!wndPtr) return FALSE;
    
    *rect = wndPtr->rectWindow;
    if (wndPtr->dwStyle & WS_CHILD)
	MapWindowPoints( wndPtr->parent->hwndSelf, 0, (POINT *)rect, 2 );
    WIN_ReleaseWndPtr(wndPtr);
    return TRUE;
}


/***********************************************************************
 *           GetWindowRgn 
 */
BOOL WINAPI GetWindowRgn ( HWND hwnd, HRGN hrgn )

{
  RECT    rect;
  WND * wndPtr = WIN_FindWndPtr( hwnd ); 
  if (!wndPtr) return (ERROR);

  FIXME("GetWindowRgn: doesn't really do regions\n"); 
  
  memset (&rect, 0, sizeof(rect));

  GetWindowRect ( hwnd, &rect );

  FIXME("Check whether a valid region here\n");

  SetRectRgn ( hrgn, rect.left, rect.top, rect.right, rect.bottom );

  WIN_ReleaseWndPtr(wndPtr);
  return (SIMPLEREGION);
}

/***********************************************************************
 *           SetWindowRgn 
 */
INT WINAPI SetWindowRgn( HWND hwnd, HRGN hrgn,BOOL bRedraw)

{

  FIXME("SetWindowRgn: stub\n"); 
  return TRUE;
}

/***********************************************************************
 *           SetWindowRgn16 
 */
INT16 WINAPI SetWindowRgn16( HWND16 hwnd, HRGN16 hrgn,BOOL16 bRedraw)

{

  FIXME("SetWindowRgn16: stub\n"); 
  return TRUE;
}


/***********************************************************************
 *           GetClientRect16   (USER.33)
 */
void WINAPI GetClientRect16( HWND16 hwnd, LPRECT16 rect ) 
{
    WND * wndPtr = WIN_FindWndPtr( hwnd );

    rect->left = rect->top = rect->right = rect->bottom = 0;
    if (wndPtr) 
    {
	rect->right  = wndPtr->rectClient.right - wndPtr->rectClient.left;
	rect->bottom = wndPtr->rectClient.bottom - wndPtr->rectClient.top;
    }
    WIN_ReleaseWndPtr(wndPtr);
}


/***********************************************************************
 *           GetClientRect   (USER.220)
 */
BOOL WINAPI GetClientRect( HWND hwnd, LPRECT rect ) 
{
    WND * wndPtr = WIN_FindWndPtr( hwnd );

    rect->left = rect->top = rect->right = rect->bottom = 0;
    if (!wndPtr) return FALSE;
    rect->right  = wndPtr->rectClient.right - wndPtr->rectClient.left;
    rect->bottom = wndPtr->rectClient.bottom - wndPtr->rectClient.top;

    WIN_ReleaseWndPtr(wndPtr);
    return TRUE;
}


/*******************************************************************
 *         ClientToScreen16   (USER.28)
 */
void WINAPI ClientToScreen16( HWND16 hwnd, LPPOINT16 lppnt )
{
    MapWindowPoints16( hwnd, 0, lppnt, 1 );
}


/*******************************************************************
 *         ClientToScreen   (USER32.52)
 */
BOOL WINAPI ClientToScreen( HWND hwnd, LPPOINT lppnt )
{
    MapWindowPoints( hwnd, 0, lppnt, 1 );
    return TRUE;
}


/*******************************************************************
 *         ScreenToClient16   (USER.29)
 */
void WINAPI ScreenToClient16( HWND16 hwnd, LPPOINT16 lppnt )
{
    MapWindowPoints16( 0, hwnd, lppnt, 1 );
}


/*******************************************************************
 *         ScreenToClient   (USER32.447)
 */
BOOL WINAPI ScreenToClient( HWND hwnd, LPPOINT lppnt )
{
    MapWindowPoints( 0, hwnd, lppnt, 1 );
    return TRUE;
}


/***********************************************************************
 *           WINPOS_WindowFromPoint
 *
 * Find the window and hittest for a given point.
 */
INT16 WINPOS_WindowFromPoint( WND* wndScope, POINT16 pt, WND **ppWnd )
{
    WND *wndPtr;
    INT16 hittest = HTERROR;
    INT16 retvalue;
    POINT16 xy = pt;

   *ppWnd = NULL;
    wndPtr = WIN_LockWndPtr(wndScope->child);
   
    if( wndScope->flags & WIN_MANAGED )
    {
	/* In managed mode we have to check wndScope first as it is also
	 * a window which received the mouse event. */

	if( wndScope->dwStyle & WS_DISABLED )
	{
	    retvalue = HTERROR;
	    goto end;
	}
	if( pt.x < wndScope->rectClient.left || pt.x >= wndScope->rectClient.right ||
	    pt.y < wndScope->rectClient.top || pt.y >= wndScope->rectClient.bottom )
	    goto hittest;
    }
    MapWindowPoints16( GetDesktopWindow16(), wndScope->hwndSelf, &xy, 1 );

    for (;;)
    {
        while (wndPtr)
        {
            /* If point is in window, and window is visible, and it  */
            /* is enabled (or it's a top-level window), then explore */
            /* its children. Otherwise, go to the next window.       */

            if ((wndPtr->dwStyle & WS_VISIBLE) &&
                (!(wndPtr->dwStyle & WS_DISABLED) ||
                 ((wndPtr->dwStyle & (WS_POPUP | WS_CHILD)) != WS_CHILD)) &&
                (xy.x >= wndPtr->rectWindow.left) &&
                (xy.x < wndPtr->rectWindow.right) &&
                (xy.y >= wndPtr->rectWindow.top) &&
                (xy.y < wndPtr->rectWindow.bottom))
            {
                *ppWnd = wndPtr;  /* Got a suitable window */

                /* If window is minimized or disabled, return at once */
                if (wndPtr->dwStyle & WS_MINIMIZE)
                {
                    retvalue = HTCAPTION;
                    goto end;
                }
                if (wndPtr->dwStyle & WS_DISABLED)
                {
                    retvalue = HTERROR;
                    goto end;
                }

                /* If point is not in client area, ignore the children */
                if ((xy.x < wndPtr->rectClient.left) ||
                    (xy.x >= wndPtr->rectClient.right) ||
                    (xy.y < wndPtr->rectClient.top) ||
                    (xy.y >= wndPtr->rectClient.bottom)) break;

                xy.x -= wndPtr->rectClient.left;
                xy.y -= wndPtr->rectClient.top;
                WIN_UpdateWndPtr(&wndPtr,wndPtr->child);
            }
            else
            {
                WIN_UpdateWndPtr(&wndPtr,wndPtr->next);
            }
        }

hittest:
        /* If nothing found, try the scope window */
        if (!*ppWnd) *ppWnd = wndScope;

        /* Send the WM_NCHITTEST message (only if to the same task) */
        if ((*ppWnd)->hmemTaskQ == GetFastQueue16())
	{
            hittest = (INT16)SendMessage16( (*ppWnd)->hwndSelf, WM_NCHITTEST, 
						 0, MAKELONG( pt.x, pt.y ) );
            if (hittest != HTTRANSPARENT)
            {
                retvalue = hittest;  /* Found the window */
                goto end;
	}
	}
        else
        {
            retvalue = HTCLIENT;
            goto end;
	}

        /* If no children found in last search, make point relative to parent */
        if (!wndPtr)
        {
            xy.x += (*ppWnd)->rectClient.left;
            xy.y += (*ppWnd)->rectClient.top;
        }

        /* Restart the search from the next sibling */
        WIN_UpdateWndPtr(&wndPtr,(*ppWnd)->next);
        *ppWnd = (*ppWnd)->parent;
    }

end:
    WIN_ReleaseWndPtr(wndPtr);
    return retvalue;
}


/*******************************************************************
 *         WindowFromPoint16   (USER.30)
 */
HWND16 WINAPI WindowFromPoint16( POINT16 pt )
{
    WND *pWnd;
    WINPOS_WindowFromPoint( WIN_GetDesktop(), pt, &pWnd );
    WIN_ReleaseDesktop();
    return pWnd->hwndSelf;
}


/*******************************************************************
 *         WindowFromPoint   (USER32.582)
 */
HWND WINAPI WindowFromPoint( POINT pt )
{
    WND *pWnd;
    POINT16 pt16;
    CONV_POINT32TO16( &pt, &pt16 );
    WINPOS_WindowFromPoint( WIN_GetDesktop(), pt16, &pWnd );
    WIN_ReleaseDesktop();
    return (HWND)pWnd->hwndSelf;
}


/*******************************************************************
 *         ChildWindowFromPoint16   (USER.191)
 */
HWND16 WINAPI ChildWindowFromPoint16( HWND16 hwndParent, POINT16 pt )
{
    POINT pt32;
    CONV_POINT16TO32( &pt, &pt32 );
    return (HWND16)ChildWindowFromPoint( hwndParent, pt32 );
}


/*******************************************************************
 *         ChildWindowFromPoint   (USER32.49)
 */
HWND WINAPI ChildWindowFromPoint( HWND hwndParent, POINT pt )
{
    /* pt is in the client coordinates */

    WND* wnd = WIN_FindWndPtr(hwndParent);
    RECT rect;
    HWND retvalue;

    if( !wnd ) return 0;

    /* get client rect fast */
    rect.top = rect.left = 0;
    rect.right = wnd->rectClient.right - wnd->rectClient.left;
    rect.bottom = wnd->rectClient.bottom - wnd->rectClient.top;

    if (!PtInRect( &rect, pt ))
    {
        retvalue = 0;
        goto end;
    }
    WIN_UpdateWndPtr(&wnd,wnd->child);
    while ( wnd )
    {
        if (PtInRect( &wnd->rectWindow, pt ))
        {
            retvalue = wnd->hwndSelf;
            goto end;
        }
        WIN_UpdateWndPtr(&wnd,wnd->next);
    }
    retvalue = hwndParent;
end:
    WIN_ReleaseWndPtr(wnd);
    return retvalue;
}

/*******************************************************************
 *         ChildWindowFromPointEx16   (USER.50)
 */
HWND16 WINAPI ChildWindowFromPointEx16( HWND16 hwndParent, POINT16 pt, UINT16 uFlags)
{
    POINT pt32;
    CONV_POINT16TO32( &pt, &pt32 );
    return (HWND16)ChildWindowFromPointEx( hwndParent, pt32, uFlags );
}


/*******************************************************************
 *         ChildWindowFromPointEx32   (USER32.50)
 */
HWND WINAPI ChildWindowFromPointEx( HWND hwndParent, POINT pt,
		UINT uFlags)
{
    /* pt is in the client coordinates */

    WND* wnd = WIN_FindWndPtr(hwndParent);
    RECT rect;
    HWND retvalue;

    if( !wnd ) return 0;

    /* get client rect fast */
    rect.top = rect.left = 0;
    rect.right = wnd->rectClient.right - wnd->rectClient.left;
    rect.bottom = wnd->rectClient.bottom - wnd->rectClient.top;

    if (!PtInRect( &rect, pt ))
    {
        retvalue = 0;
        goto end;
    }
    WIN_UpdateWndPtr(&wnd,wnd->child);

    while ( wnd )
    {
        if (PtInRect( &wnd->rectWindow, pt )) {
		if ( (uFlags & CWP_SKIPINVISIBLE) && 
				!(wnd->dwStyle & WS_VISIBLE) );
		else if ( (uFlags & CWP_SKIPDISABLED) && 
				(wnd->dwStyle & WS_DISABLED) );
		else if ( (uFlags & CWP_SKIPTRANSPARENT) && 
				(wnd->dwExStyle & WS_EX_TRANSPARENT) );
		else
                {
                    retvalue = wnd->hwndSelf;
                    goto end;
	        }
                
	}
	WIN_UpdateWndPtr(&wnd,wnd->next);
    }
    retvalue = hwndParent;
end:
    WIN_ReleaseWndPtr(wnd);
    return retvalue;
}


/*******************************************************************
 *         WINPOS_GetWinOffset
 *
 * Calculate the offset between the origin of the two windows. Used
 * to implement MapWindowPoints.
 */
static void WINPOS_GetWinOffset( HWND hwndFrom, HWND hwndTo,
                                 POINT *offset )
{
    WND * wndPtr = 0;

    offset->x = offset->y = 0;
    if (hwndFrom == hwndTo ) return;

      /* Translate source window origin to screen coords */
    if (hwndFrom)
    {
        if (!(wndPtr = WIN_FindWndPtr( hwndFrom )))
        {
            ERR("bad hwndFrom = %04x\n",hwndFrom);
            return;
        }
        while (wndPtr->parent)
        {
            offset->x += wndPtr->rectClient.left;
            offset->y += wndPtr->rectClient.top;
            WIN_UpdateWndPtr(&wndPtr,wndPtr->parent);
        }
        WIN_ReleaseWndPtr(wndPtr);
    }

      /* Translate origin to destination window coords */
    if (hwndTo)
    {
        if (!(wndPtr = WIN_FindWndPtr( hwndTo )))
        {
            ERR("bad hwndTo = %04x\n", hwndTo );
            return;
        }
        while (wndPtr->parent)
        {
            offset->x -= wndPtr->rectClient.left;
            offset->y -= wndPtr->rectClient.top;
            WIN_UpdateWndPtr(&wndPtr,wndPtr->parent);
        }    
        WIN_ReleaseWndPtr(wndPtr);
    }
}


/*******************************************************************
 *         MapWindowPoints16   (USER.258)
 */
void WINAPI MapWindowPoints16( HWND16 hwndFrom, HWND16 hwndTo,
                               LPPOINT16 lppt, UINT16 count )
{
    POINT offset;

    WINPOS_GetWinOffset( hwndFrom, hwndTo, &offset );
    while (count--)
    {
	lppt->x += offset.x;
	lppt->y += offset.y;
        lppt++;
    }
}


/*******************************************************************
 *         MapWindowPoints   (USER32.386)
 */
INT WINAPI MapWindowPoints( HWND hwndFrom, HWND hwndTo,
                               LPPOINT lppt, UINT count )
{
    POINT offset;

    WINPOS_GetWinOffset( hwndFrom, hwndTo, &offset );
    while (count--)
    {
	lppt->x += offset.x;
	lppt->y += offset.y;
        lppt++;
    }
    return MAKELONG( LOWORD(offset.x), LOWORD(offset.y) );
}


/***********************************************************************
 *           IsIconic16   (USER.31)
 */
BOOL16 WINAPI IsIconic16(HWND16 hWnd)
{
    return IsIconic(hWnd);
}


/***********************************************************************
 *           IsIconic   (USER32.345)
 */
BOOL WINAPI IsIconic(HWND hWnd)
{
    BOOL retvalue;
    WND * wndPtr = WIN_FindWndPtr(hWnd);
    if (wndPtr == NULL) return FALSE;
    retvalue = (wndPtr->dwStyle & WS_MINIMIZE) != 0;
    WIN_ReleaseWndPtr(wndPtr);
    return retvalue;
}
 
 
/***********************************************************************
 *           IsZoomed   (USER.272)
 */
BOOL16 WINAPI IsZoomed16(HWND16 hWnd)
{
    return IsZoomed(hWnd);
}


/***********************************************************************
 *           IsZoomed   (USER.352)
 */
BOOL WINAPI IsZoomed(HWND hWnd)
{
    BOOL retvalue;
    WND * wndPtr = WIN_FindWndPtr(hWnd);
    if (wndPtr == NULL) return FALSE;
    retvalue = (wndPtr->dwStyle & WS_MAXIMIZE) != 0;
    WIN_ReleaseWndPtr(wndPtr);
    return retvalue;
}


/*******************************************************************
 *         GetActiveWindow    (USER.60)
 */
HWND16 WINAPI GetActiveWindow16(void)
{
    return (HWND16)GetActiveWindow();
}

/*******************************************************************
 *         GetActiveWindow    (USER32.205)
 */
HWND WINAPI GetActiveWindow(void)
{
    MESSAGEQUEUE *pCurMsgQ = 0;
    HWND hwndActive = 0;

    /* Get the messageQ for the current thread */
    if (!(pCurMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
{
        WARN("\tCurrent message queue not found. Exiting!\n" );
        return 0;
    }

    /* Return the current active window from the perQ data of the current message Q */
    hwndActive = PERQDATA_GetActiveWnd( pCurMsgQ->pQData );

    QUEUE_Unlock( pCurMsgQ );
    return hwndActive;
}


/*******************************************************************
 *         WINPOS_CanActivate
 */
static BOOL WINPOS_CanActivate(WND* pWnd)
{
    if( pWnd && !(pWnd->dwStyle & (WS_DISABLED | WS_CHILD)) ) return TRUE;
    return FALSE;
}


/*******************************************************************
 *         SetActiveWindow16    (USER.59)
 */
HWND16 WINAPI SetActiveWindow16( HWND16 hwnd )
{
    return SetActiveWindow(hwnd);
}


/*******************************************************************
 *         SetActiveWindow    (USER32.463)
 */
HWND WINAPI SetActiveWindow( HWND hwnd )
{
    HWND prev = 0;
    WND *wndPtr = WIN_FindWndPtr( hwnd );
    MESSAGEQUEUE *pMsgQ = 0, *pCurMsgQ = 0;

    if ( !WINPOS_CanActivate(wndPtr) )
    {
        prev = 0;
        goto end;
    }

    /* Get the messageQ for the current thread */
    if (!(pCurMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
    {
        WARN("\tCurrent message queue not found. Exiting!\n" );
        goto CLEANUP;
    }
    
    /* Retrieve the message queue associated with this window */
    pMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( wndPtr->hmemTaskQ );
    if ( !pMsgQ )
    {
        WARN("\tWindow message queue not found. Exiting!\n" );
        goto CLEANUP;
    }

    /* Make sure that the window is associated with the calling threads
     * message queue. It must share the same perQ data.
     */
    
    if ( pCurMsgQ->pQData != pMsgQ->pQData )
        goto CLEANUP;
    
    /* Save current active window */
    prev = PERQDATA_GetActiveWnd( pMsgQ->pQData );
    
    WINPOS_SetActiveWindow( hwnd, 0, 0 );

CLEANUP:
    /* Unlock the queues before returning */
    if ( pMsgQ )
        QUEUE_Unlock( pMsgQ );
    if ( pCurMsgQ )
        QUEUE_Unlock( pCurMsgQ );
    
end:
    WIN_ReleaseWndPtr(wndPtr);
    return prev;
}


/*******************************************************************
 *         GetForegroundWindow16    (USER.608)
 */
HWND16 WINAPI GetForegroundWindow16(void)
{
    return (HWND16)GetForegroundWindow();
}


/*******************************************************************
 *         SetForegroundWindow16    (USER.609)
 */
BOOL16 WINAPI SetForegroundWindow16( HWND16 hwnd )
{
    return SetForegroundWindow( hwnd );
}


/*******************************************************************
 *         GetForegroundWindow    (USER32.241)
 */
HWND WINAPI GetForegroundWindow(void)
{
    HWND hwndActive = 0;

    /* Get the foreground window (active window of hActiveQueue) */
    if ( hActiveQueue )
    {
        MESSAGEQUEUE *pActiveQueue = QUEUE_Lock( hActiveQueue );
        if ( pActiveQueue )
            hwndActive = PERQDATA_GetActiveWnd( pActiveQueue->pQData );

        QUEUE_Unlock( pActiveQueue );
    }

    return hwndActive;
}

/*******************************************************************
 *         SetForegroundWindow    (USER32.482)
 */
BOOL WINAPI SetForegroundWindow( HWND hwnd )
{
    return WINPOS_ChangeActiveWindow( hwnd, FALSE );
}


/*******************************************************************
 *         GetShellWindow16    (USER.600)
 */
HWND16 WINAPI GetShellWindow16(void)
{
    return GetShellWindow();
}

/*******************************************************************
 *         SetShellWindow    (USER32.504)
 */
HWND WINAPI SetShellWindow(HWND hwndshell)
{   WARN("(hWnd=%08x) semi stub\n",hwndshell );

    hGlobalShellWindow = hwndshell;
    return hGlobalShellWindow;
}


/*******************************************************************
 *         GetShellWindow    (USER32.287)
 */
HWND WINAPI GetShellWindow(void)
{   WARN("(hWnd=%x) semi stub\n",hGlobalShellWindow );

    return hGlobalShellWindow;
}


/***********************************************************************
 *           BringWindowToTop16   (USER.45)
 */
BOOL16 WINAPI BringWindowToTop16( HWND16 hwnd )
{
    return BringWindowToTop(hwnd);
}


/***********************************************************************
 *           BringWindowToTop   (USER32.11)
 */
BOOL WINAPI BringWindowToTop( HWND hwnd )
{
    return SetWindowPos( hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE );
}


/***********************************************************************
 *           MoveWindow16   (USER.56)
 */
BOOL16 WINAPI MoveWindow16( HWND16 hwnd, INT16 x, INT16 y, INT16 cx, INT16 cy,
                            BOOL16 repaint )
{
    return MoveWindow(hwnd,x,y,cx,cy,repaint);
}


/***********************************************************************
 *           MoveWindow   (USER32.399)
 */
BOOL WINAPI MoveWindow( HWND hwnd, INT x, INT y, INT cx, INT cy,
                            BOOL repaint )
{    
    int flags = SWP_NOZORDER | SWP_NOACTIVATE;
    if (!repaint) flags |= SWP_NOREDRAW;
    TRACE("%04x %d,%d %dx%d %d\n", 
	    hwnd, x, y, cx, cy, repaint );
    return SetWindowPos( hwnd, 0, x, y, cx, cy, flags );
}

/***********************************************************************
 *           WINPOS_InitInternalPos
 */
static LPINTERNALPOS WINPOS_InitInternalPos( WND* wnd, POINT pt, 
					     LPRECT restoreRect )
{
    LPINTERNALPOS lpPos = (LPINTERNALPOS) GetPropA( wnd->hwndSelf,
                                                      atomInternalPos );
    if( !lpPos )
    {
	/* this happens when the window is minimized/maximized 
	 * for the first time (rectWindow is not adjusted yet) */

	lpPos = HeapAlloc( SystemHeap, 0, sizeof(INTERNALPOS) );
	if( !lpPos ) return NULL;

	SetPropA( wnd->hwndSelf, atomInternalPos, (HANDLE)lpPos );
	lpPos->hwndIconTitle = 0; /* defer until needs to be shown */
        CONV_RECT32TO16( &wnd->rectWindow, &lpPos->rectNormal );
	*(UINT*)&lpPos->ptIconPos = *(UINT*)&lpPos->ptMaxPos = 0xFFFFFFFF;
    }

    if( wnd->dwStyle & WS_MINIMIZE ) 
	CONV_POINT32TO16( &pt, &lpPos->ptIconPos );
    else if( wnd->dwStyle & WS_MAXIMIZE ) 
	CONV_POINT32TO16( &pt, &lpPos->ptMaxPos );
    else if( restoreRect ) 
	CONV_RECT32TO16( restoreRect, &lpPos->rectNormal );

    return lpPos;
}

/***********************************************************************
 *           WINPOS_RedrawIconTitle
 */
BOOL WINPOS_RedrawIconTitle( HWND hWnd )
{
    LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hWnd, atomInternalPos );
    if( lpPos )
    {
	if( lpPos->hwndIconTitle )
	{
	    SendMessageA( lpPos->hwndIconTitle, WM_SHOWWINDOW, TRUE, 0);
	    InvalidateRect( lpPos->hwndIconTitle, NULL, TRUE );
	    return TRUE;
	}
    }
    return FALSE;
}

/***********************************************************************
 *           WINPOS_ShowIconTitle
 */
BOOL WINPOS_ShowIconTitle( WND* pWnd, BOOL bShow )
{
    LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( pWnd->hwndSelf, atomInternalPos );

    if( lpPos && !(pWnd->flags & WIN_MANAGED))
    {
	HWND16 hWnd = lpPos->hwndIconTitle;

	TRACE("0x%04x %i\n", pWnd->hwndSelf, (bShow != 0) );

	if( !hWnd )
	    lpPos->hwndIconTitle = hWnd = ICONTITLE_Create( pWnd );
	if( bShow )
        {
	    if( ( pWnd = WIN_FindWndPtr(hWnd) ) != NULL) 
	    {
	        if( !(pWnd->dwStyle & WS_VISIBLE) )
		{
		   SendMessageA( hWnd, WM_SHOWWINDOW, TRUE, 0 );
		   SetWindowPos( hWnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE |
				 SWP_NOACTIVATE | SWP_NOZORDER | SWP_SHOWWINDOW );
		}
		WIN_ReleaseWndPtr(pWnd);
	    }
	}
	else ShowWindow( hWnd, SW_HIDE );
    }
    return FALSE;
}

/*******************************************************************
 *           WINPOS_GetMinMaxInfo
 *
 * Get the minimized and maximized information for a window.
 */
void WINPOS_GetMinMaxInfo( WND *wndPtr, POINT *maxSize, POINT *maxPos,
			   POINT *minTrack, POINT *maxTrack )
{
    LPINTERNALPOS lpPos;
    MINMAXINFO MinMax;
    INT xinc, yinc;

    /* Compute default values */

    MinMax.ptMaxSize.x = GetSystemMetrics(SM_CXSCREEN);
    MinMax.ptMaxSize.y = GetSystemMetrics(SM_CYSCREEN);
    MinMax.ptMinTrackSize.x = GetSystemMetrics(SM_CXMINTRACK);
    MinMax.ptMinTrackSize.y = GetSystemMetrics(SM_CYMINTRACK);
    MinMax.ptMaxTrackSize.x = GetSystemMetrics(SM_CXSCREEN);
    MinMax.ptMaxTrackSize.y = GetSystemMetrics(SM_CYSCREEN);

    if (wndPtr->flags & WIN_MANAGED) xinc = yinc = 0;
    else if (HAS_DLGFRAME( wndPtr->dwStyle, wndPtr->dwExStyle ))
    {
        xinc = GetSystemMetrics(SM_CXDLGFRAME);
        yinc = GetSystemMetrics(SM_CYDLGFRAME);
    }
    else
    {
        xinc = yinc = 0;
        if (HAS_THICKFRAME(wndPtr->dwStyle))
        {
            xinc += GetSystemMetrics(SM_CXFRAME);
            yinc += GetSystemMetrics(SM_CYFRAME);
        }
        if (wndPtr->dwStyle & WS_BORDER)
        {
            xinc += GetSystemMetrics(SM_CXBORDER);
            yinc += GetSystemMetrics(SM_CYBORDER);
        }
    }
    MinMax.ptMaxSize.x += 2 * xinc;
    MinMax.ptMaxSize.y += 2 * yinc;

    lpPos = (LPINTERNALPOS)GetPropA( wndPtr->hwndSelf, atomInternalPos );
    if( lpPos && !EMPTYPOINT(lpPos->ptMaxPos) )
	CONV_POINT16TO32( &lpPos->ptMaxPos, &MinMax.ptMaxPosition );
    else
    {
        MinMax.ptMaxPosition.x = -xinc;
        MinMax.ptMaxPosition.y = -yinc;
    }

    SendMessageA( wndPtr->hwndSelf, WM_GETMINMAXINFO, 0, (LPARAM)&MinMax );

      /* Some sanity checks */

    TRACE("%ld %ld / %ld %ld / %ld %ld / %ld %ld\n",
                      MinMax.ptMaxSize.x, MinMax.ptMaxSize.y,
                      MinMax.ptMaxPosition.x, MinMax.ptMaxPosition.y,
                      MinMax.ptMaxTrackSize.x, MinMax.ptMaxTrackSize.y,
                      MinMax.ptMinTrackSize.x, MinMax.ptMinTrackSize.y);
    MinMax.ptMaxTrackSize.x = MAX( MinMax.ptMaxTrackSize.x,
                                   MinMax.ptMinTrackSize.x );
    MinMax.ptMaxTrackSize.y = MAX( MinMax.ptMaxTrackSize.y,
                                   MinMax.ptMinTrackSize.y );

    if (maxSize) *maxSize = MinMax.ptMaxSize;
    if (maxPos) *maxPos = MinMax.ptMaxPosition;
    if (minTrack) *minTrack = MinMax.ptMinTrackSize;
    if (maxTrack) *maxTrack = MinMax.ptMaxTrackSize;
}

/***********************************************************************
 *           WINPOS_MinMaximize
 *
 * Fill in lpRect and return additional flags to be used with SetWindowPos().
 * This function assumes that 'cmd' is different from the current window
 * state.
 */
UINT WINPOS_MinMaximize( WND* wndPtr, UINT16 cmd, LPRECT16 lpRect )
{
    UINT swpFlags = 0;
    POINT pt, size;
    LPINTERNALPOS lpPos;

    TRACE("0x%04x %u\n", wndPtr->hwndSelf, cmd );

    size.x = wndPtr->rectWindow.left; size.y = wndPtr->rectWindow.top;
    lpPos = WINPOS_InitInternalPos( wndPtr, size, &wndPtr->rectWindow );

    if (lpPos && !HOOK_CallHooks16(WH_CBT, HCBT_MINMAX, wndPtr->hwndSelf, cmd))
    {
	if( wndPtr->dwStyle & WS_MINIMIZE )
	{
	    if( !SendMessageA( wndPtr->hwndSelf, WM_QUERYOPEN, 0, 0L ) )
		return (SWP_NOSIZE | SWP_NOMOVE);
	    swpFlags |= SWP_NOCOPYBITS;
	}
	switch( cmd )
	{
	    case SW_MINIMIZE:
		 if( wndPtr->dwStyle & WS_MAXIMIZE)
		 {
		     wndPtr->flags |= WIN_RESTORE_MAX;
		     wndPtr->dwStyle &= ~WS_MAXIMIZE;
                 }
                 else
		     wndPtr->flags &= ~WIN_RESTORE_MAX;
		 wndPtr->dwStyle |= WS_MINIMIZE;

		 if( wndPtr->flags & WIN_NATIVE )
		     if( wndPtr->pDriver->pSetHostAttr( wndPtr, HAK_ICONICSTATE, TRUE ) )
			 swpFlags |= MINMAX_NOSWP;

		 lpPos->ptIconPos = WINPOS_FindIconPos( wndPtr, lpPos->ptIconPos );

		 SetRect16( lpRect, lpPos->ptIconPos.x, lpPos->ptIconPos.y,
				    GetSystemMetrics(SM_CXICON), GetSystemMetrics(SM_CYICON) );
		 swpFlags |= SWP_NOCOPYBITS;
		 break;

	    case SW_MAXIMIZE:
                CONV_POINT16TO32( &lpPos->ptMaxPos, &pt );
                WINPOS_GetMinMaxInfo( wndPtr, &size, &pt, NULL, NULL );
                CONV_POINT32TO16( &pt, &lpPos->ptMaxPos );

		 if( wndPtr->dwStyle & WS_MINIMIZE )
		 {
		     if( wndPtr->flags & WIN_NATIVE )
			 if( wndPtr->pDriver->pSetHostAttr( wndPtr, HAK_ICONICSTATE, FALSE ) )
			     swpFlags |= MINMAX_NOSWP;

		     WINPOS_ShowIconTitle( wndPtr, FALSE );
		     wndPtr->dwStyle &= ~WS_MINIMIZE;
		 }
                 wndPtr->dwStyle |= WS_MAXIMIZE;

		 SetRect16( lpRect, lpPos->ptMaxPos.x, lpPos->ptMaxPos.y,
				    size.x, size.y );
		 break;

	    case SW_RESTORE:
		 if( wndPtr->dwStyle & WS_MINIMIZE )
		 {
		     if( wndPtr->flags & WIN_NATIVE )
			 if( wndPtr->pDriver->pSetHostAttr( wndPtr, HAK_ICONICSTATE, FALSE ) )
			     swpFlags |= MINMAX_NOSWP;

		     wndPtr->dwStyle &= ~WS_MINIMIZE;
		     WINPOS_ShowIconTitle( wndPtr, FALSE );

		     if( wndPtr->flags & WIN_RESTORE_MAX)
		     {
			 /* Restore to maximized position */
                         CONV_POINT16TO32( &lpPos->ptMaxPos, &pt );
                         WINPOS_GetMinMaxInfo( wndPtr, &size, &pt, NULL, NULL);
                         CONV_POINT32TO16( &pt, &lpPos->ptMaxPos );
			 wndPtr->dwStyle |= WS_MAXIMIZE;
			 SetRect16( lpRect, lpPos->ptMaxPos.x, lpPos->ptMaxPos.y, size.x, size.y );
			 break;
		     }
		 } 
		 else 
		     if( !(wndPtr->dwStyle & WS_MAXIMIZE) ) return (UINT16)(-1);
 		     else wndPtr->dwStyle &= ~WS_MAXIMIZE;

		 /* Restore to normal position */

		*lpRect = lpPos->rectNormal; 
		 lpRect->right -= lpRect->left; 
		 lpRect->bottom -= lpRect->top;

		 break;
	}
    } else swpFlags |= SWP_NOSIZE | SWP_NOMOVE;
    return swpFlags;
}

/***********************************************************************
 *           ShowWindowAsync   (USER32.535)
 *
 * doesn't wait; returns immediately.
 * used by threads to toggle windows in other (possibly hanging) threads
 */
BOOL WINAPI ShowWindowAsync( HWND hwnd, INT cmd )
{
    /* FIXME: does ShowWindow() return immediately ? */
    return ShowWindow(hwnd, cmd);
}


/***********************************************************************
 *           ShowWindow16   (USER.42)
 */
BOOL16 WINAPI ShowWindow16( HWND16 hwnd, INT16 cmd ) 
{    
    return ShowWindow(hwnd,cmd);
}


/***********************************************************************
 *           ShowWindow   (USER32.534)
 */
BOOL WINAPI ShowWindow( HWND hwnd, INT cmd ) 
{    
    WND* 	wndPtr = WIN_FindWndPtr( hwnd );
    BOOL 	wasVisible, showFlag;
    RECT16 	newPos = {0, 0, 0, 0};
    UINT 	swp = 0;

    if (!wndPtr) return FALSE;

    TRACE("hwnd=%04x, cmd=%d\n", hwnd, cmd);

    wasVisible = (wndPtr->dwStyle & WS_VISIBLE) != 0;

    switch(cmd)
    {
        case SW_HIDE:
            if (!wasVisible) goto END;;
	    swp |= SWP_HIDEWINDOW | SWP_NOSIZE | SWP_NOMOVE | 
		        SWP_NOACTIVATE | SWP_NOZORDER;
	    break;

	case SW_SHOWMINNOACTIVE:
            swp |= SWP_NOACTIVATE | SWP_NOZORDER;
            /* fall through */
	case SW_SHOWMINIMIZED:
            swp |= SWP_SHOWWINDOW;
            /* fall through */
	case SW_MINIMIZE:
            swp |= SWP_FRAMECHANGED;
            if( !(wndPtr->dwStyle & WS_MINIMIZE) )
		 swp |= WINPOS_MinMaximize( wndPtr, SW_MINIMIZE, &newPos );
            else swp |= SWP_NOSIZE | SWP_NOMOVE;
	    break;

	case SW_SHOWMAXIMIZED: /* same as SW_MAXIMIZE */
            swp |= SWP_SHOWWINDOW | SWP_FRAMECHANGED;
            if( !(wndPtr->dwStyle & WS_MAXIMIZE) )
		 swp |= WINPOS_MinMaximize( wndPtr, SW_MAXIMIZE, &newPos );
            else swp |= SWP_NOSIZE | SWP_NOMOVE;
            break;

	case SW_SHOWNA:
            swp |= SWP_NOACTIVATE | SWP_NOZORDER;
            /* fall through */
	case SW_SHOW:
	    swp |= SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE;

	    /*
	     * ShowWindow has a little peculiar behavior that if the
	     * window is already the topmost window, it will not
	     * activate it.
	     */
	    if (GetTopWindow((HWND)0)==hwnd && (wasVisible || GetActiveWindow() == hwnd))
	      swp |= SWP_NOACTIVATE;

	    break;

	case SW_SHOWNOACTIVATE:
            swp |= SWP_NOZORDER;
            if (GetActiveWindow()) swp |= SWP_NOACTIVATE;
            /* fall through */
	case SW_SHOWNORMAL:  /* same as SW_NORMAL: */
	case SW_SHOWDEFAULT: /* FIXME: should have its own handler */
	case SW_RESTORE:
	    swp |= SWP_SHOWWINDOW | SWP_FRAMECHANGED;

            if( wndPtr->dwStyle & (WS_MINIMIZE | WS_MAXIMIZE) )
		 swp |= WINPOS_MinMaximize( wndPtr, SW_RESTORE, &newPos );
            else swp |= SWP_NOSIZE | SWP_NOMOVE;
	    break;
    }

    showFlag = (cmd != SW_HIDE);
    if (showFlag != wasVisible)
    {
        SendMessageA( hwnd, WM_SHOWWINDOW, showFlag, 0 );
        if (!IsWindow( hwnd )) goto END;
    }

    if ((wndPtr->dwStyle & WS_CHILD) &&
        !IsWindowVisible( wndPtr->parent->hwndSelf ) &&
        (swp & (SWP_NOSIZE | SWP_NOMOVE)) == (SWP_NOSIZE | SWP_NOMOVE) )
    {
        /* Don't call SetWindowPos() on invisible child windows */
        if (cmd == SW_HIDE) wndPtr->dwStyle &= ~WS_VISIBLE;
        else wndPtr->dwStyle |= WS_VISIBLE;
    }
    else
    {
        /* We can't activate a child window */
        if ((wndPtr->dwStyle & WS_CHILD) &&
            !(wndPtr->dwExStyle & WS_EX_MDICHILD))
            swp |= SWP_NOACTIVATE | SWP_NOZORDER;
	if (!(swp & MINMAX_NOSWP))
        {
	    SetWindowPos( hwnd, HWND_TOP, newPos.left, newPos.top, 
					  newPos.right, newPos.bottom, LOWORD(swp) );
            if (cmd == SW_HIDE)
            {
               /* FIXME: This will cause the window to be activated irrespective
                * of whether it is owned by the same thread. Has to be done
                * asynchronously.
                */

               if (hwnd == GetActiveWindow())
                  WINPOS_ActivateOtherWindow(wndPtr);

               /* Revert focus to parent */
               if (hwnd == GetFocus() || IsChild(hwnd, GetFocus()))
                  SetFocus( GetParent(hwnd) );
            }
        }
        if (!IsWindow( hwnd )) goto END;
	else if( wndPtr->dwStyle & WS_MINIMIZE ) WINPOS_ShowIconTitle( wndPtr, TRUE );
    }

    if (wndPtr->flags & WIN_NEED_SIZE)
    {
        /* should happen only in CreateWindowEx() */
	int wParam = SIZE_RESTORED;

	wndPtr->flags &= ~WIN_NEED_SIZE;
	if (wndPtr->dwStyle & WS_MAXIMIZE) wParam = SIZE_MAXIMIZED;
	else if (wndPtr->dwStyle & WS_MINIMIZE) wParam = SIZE_MINIMIZED;
	SendMessageA( hwnd, WM_SIZE, wParam,
		     MAKELONG(wndPtr->rectClient.right-wndPtr->rectClient.left,
			    wndPtr->rectClient.bottom-wndPtr->rectClient.top));
	SendMessageA( hwnd, WM_MOVE, 0,
		   MAKELONG(wndPtr->rectClient.left, wndPtr->rectClient.top) );
    }

END:
    WIN_ReleaseWndPtr(wndPtr);
    return wasVisible;
}


/***********************************************************************
 *           GetInternalWindowPos16   (USER.460)
 */
UINT16 WINAPI GetInternalWindowPos16( HWND16 hwnd, LPRECT16 rectWnd,
                                      LPPOINT16 ptIcon )
{
    WINDOWPLACEMENT16 wndpl;
    if (GetWindowPlacement16( hwnd, &wndpl )) 
    {
	if (rectWnd) *rectWnd = wndpl.rcNormalPosition;
	if (ptIcon)  *ptIcon = wndpl.ptMinPosition;
	return wndpl.showCmd;
    }
    return 0;
}


/***********************************************************************
 *           GetInternalWindowPos   (USER32.245)
 */
UINT WINAPI GetInternalWindowPos( HWND hwnd, LPRECT rectWnd,
                                      LPPOINT ptIcon )
{
    WINDOWPLACEMENT wndpl;
    if (GetWindowPlacement( hwnd, &wndpl ))
    {
	if (rectWnd) *rectWnd = wndpl.rcNormalPosition;
	if (ptIcon)  *ptIcon = wndpl.ptMinPosition;
	return wndpl.showCmd;
    }
    return 0;
}

/***********************************************************************
 *           GetWindowPlacement16   (USER.370)
 */
BOOL16 WINAPI GetWindowPlacement16( HWND16 hwnd, WINDOWPLACEMENT16 *wndpl )
{
    WND *pWnd = WIN_FindWndPtr( hwnd );
    LPINTERNALPOS lpPos;
    
    if(!pWnd ) return FALSE;

    lpPos = (LPINTERNALPOS)WINPOS_InitInternalPos( pWnd,
			     *(LPPOINT)&pWnd->rectWindow.left, &pWnd->rectWindow );
	wndpl->length  = sizeof(*wndpl);
	if( pWnd->dwStyle & WS_MINIMIZE )
	    wndpl->showCmd = SW_SHOWMINIMIZED;
	else 
	    wndpl->showCmd = ( pWnd->dwStyle & WS_MAXIMIZE )
			     ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL ;
	if( pWnd->flags & WIN_RESTORE_MAX )
	    wndpl->flags = WPF_RESTORETOMAXIMIZED;
	else
	    wndpl->flags = 0;
	wndpl->ptMinPosition = lpPos->ptIconPos;
	wndpl->ptMaxPosition = lpPos->ptMaxPos;
	wndpl->rcNormalPosition = lpPos->rectNormal;

    WIN_ReleaseWndPtr(pWnd);
	return TRUE;
    }


/***********************************************************************
 *           GetWindowPlacement   (USER32.307)
 *
 * Win95:
 * Fails if wndpl->length of Win95 (!) apps is invalid.
 */
BOOL WINAPI GetWindowPlacement( HWND hwnd, WINDOWPLACEMENT *pwpl32 )
{
    if( pwpl32 )
    {
	WINDOWPLACEMENT16 wpl;
	wpl.length = sizeof(wpl);
        if( GetWindowPlacement16( hwnd, &wpl ) )
	{
	    pwpl32->length = sizeof(*pwpl32);
	    pwpl32->flags = wpl.flags;
	    pwpl32->showCmd = wpl.showCmd;
	    CONV_POINT16TO32( &wpl.ptMinPosition, &pwpl32->ptMinPosition );
	    CONV_POINT16TO32( &wpl.ptMaxPosition, &pwpl32->ptMaxPosition );
	    CONV_RECT16TO32( &wpl.rcNormalPosition, &pwpl32->rcNormalPosition );
	    return TRUE;
	}
    }
    return FALSE;
}


/***********************************************************************
 *           WINPOS_SetPlacement
 */
static BOOL WINPOS_SetPlacement( HWND hwnd, const WINDOWPLACEMENT16 *wndpl,
						UINT flags )
{
    WND *pWnd = WIN_FindWndPtr( hwnd );
    if( pWnd )
    {
	LPINTERNALPOS lpPos = (LPINTERNALPOS)WINPOS_InitInternalPos( pWnd,
			     *(LPPOINT)&pWnd->rectWindow.left, &pWnd->rectWindow );

	if( flags & PLACE_MIN ) lpPos->ptIconPos = wndpl->ptMinPosition;
	if( flags & PLACE_MAX ) lpPos->ptMaxPos = wndpl->ptMaxPosition;
	if( flags & PLACE_RECT) lpPos->rectNormal = wndpl->rcNormalPosition;

	if( pWnd->dwStyle & WS_MINIMIZE )
	{
	    WINPOS_ShowIconTitle( pWnd, FALSE );
	    if( wndpl->flags & WPF_SETMINPOSITION && !EMPTYPOINT(lpPos->ptIconPos))
		SetWindowPos( hwnd, 0, lpPos->ptIconPos.x, lpPos->ptIconPos.y,
				0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
	} 
	else if( pWnd->dwStyle & WS_MAXIMIZE )
	{
	    if( !EMPTYPOINT(lpPos->ptMaxPos) )
		SetWindowPos( hwnd, 0, lpPos->ptMaxPos.x, lpPos->ptMaxPos.y,
				0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
	}
	else if( flags & PLACE_RECT )
		SetWindowPos( hwnd, 0, lpPos->rectNormal.left, lpPos->rectNormal.top,
				lpPos->rectNormal.right - lpPos->rectNormal.left,
				lpPos->rectNormal.bottom - lpPos->rectNormal.top,
				SWP_NOZORDER | SWP_NOACTIVATE );

	ShowWindow( hwnd, wndpl->showCmd );
	if( IsWindow(hwnd) && pWnd->dwStyle & WS_MINIMIZE )
	{
	    if( pWnd->dwStyle & WS_VISIBLE ) WINPOS_ShowIconTitle( pWnd, TRUE );

	    /* SDK: ...valid only the next time... */
	    if( wndpl->flags & WPF_RESTORETOMAXIMIZED ) pWnd->flags |= WIN_RESTORE_MAX;
	}
        WIN_ReleaseWndPtr(pWnd);
	return TRUE;
    }
    return FALSE;
}


/***********************************************************************
 *           SetWindowPlacement16   (USER.371)
 */
BOOL16 WINAPI SetWindowPlacement16(HWND16 hwnd, const WINDOWPLACEMENT16 *wndpl)
{
    return WINPOS_SetPlacement( hwnd, wndpl,
                                PLACE_MIN | PLACE_MAX | PLACE_RECT );
}

/***********************************************************************
 *           SetWindowPlacement   (USER32.519)
 *
 * Win95:
 * Fails if wndpl->length of Win95 (!) apps is invalid.
 */
BOOL WINAPI SetWindowPlacement( HWND hwnd, const WINDOWPLACEMENT *pwpl32 )
{
    if( pwpl32 )
    {
	WINDOWPLACEMENT16 wpl;

	wpl.length = sizeof(WINDOWPLACEMENT16);
	wpl.flags = pwpl32->flags;
	wpl.showCmd = pwpl32->showCmd;
	wpl.ptMinPosition.x = pwpl32->ptMinPosition.x;
	wpl.ptMinPosition.y = pwpl32->ptMinPosition.y;
	wpl.ptMaxPosition.x = pwpl32->ptMaxPosition.x;
	wpl.ptMaxPosition.y = pwpl32->ptMaxPosition.y;
	wpl.rcNormalPosition.left = pwpl32->rcNormalPosition.left;
	wpl.rcNormalPosition.top = pwpl32->rcNormalPosition.top;
	wpl.rcNormalPosition.right = pwpl32->rcNormalPosition.right;
	wpl.rcNormalPosition.bottom = pwpl32->rcNormalPosition.bottom;

        return WINPOS_SetPlacement( hwnd, &wpl, PLACE_MIN | PLACE_MAX | PLACE_RECT );
    }
    return FALSE;
}


/***********************************************************************
 *           SetInternalWindowPos16   (USER.461)
 */
void WINAPI SetInternalWindowPos16( HWND16 hwnd, UINT16 showCmd,
                                    LPRECT16 rect, LPPOINT16 pt )
{
    if( IsWindow16(hwnd) )
    {
	WINDOWPLACEMENT16 wndpl;
	UINT flags;

	wndpl.length  = sizeof(wndpl);
	wndpl.showCmd = showCmd;
	wndpl.flags = flags = 0;

	if( pt )
	{
	    flags |= PLACE_MIN;
	    wndpl.flags |= WPF_SETMINPOSITION;
	    wndpl.ptMinPosition = *pt;
	}
	if( rect )
	{
	    flags |= PLACE_RECT;
	    wndpl.rcNormalPosition = *rect;
	}
	WINPOS_SetPlacement( hwnd, &wndpl, flags );
    }
}


/***********************************************************************
 *           SetInternalWindowPos   (USER32.483)
 */
void WINAPI SetInternalWindowPos( HWND hwnd, UINT showCmd,
                                    LPRECT rect, LPPOINT pt )
{
    if( IsWindow(hwnd) )
    {
	WINDOWPLACEMENT16 wndpl;
	UINT flags;

	wndpl.length  = sizeof(wndpl);
	wndpl.showCmd = showCmd;
	wndpl.flags = flags = 0;

	if( pt )
	{
            flags |= PLACE_MIN;
            wndpl.flags |= WPF_SETMINPOSITION;
            CONV_POINT32TO16( pt, &wndpl.ptMinPosition );
	}
	if( rect )
	{
            flags |= PLACE_RECT;
            CONV_RECT32TO16( rect, &wndpl.rcNormalPosition );
	}
        WINPOS_SetPlacement( hwnd, &wndpl, flags );
    }
}

/*******************************************************************
 *	   WINPOS_SetActiveWindow
 *
 * SetActiveWindow() back-end. This is the only function that
 * can assign active status to a window. It must be called only
 * for the top level windows.
 */
BOOL WINPOS_SetActiveWindow( HWND hWnd, BOOL fMouse, BOOL fChangeFocus)
{
    CBTACTIVATESTRUCT16* cbtStruct;
    WND*     wndPtr=0, *wndTemp;
    HQUEUE16 hOldActiveQueue, hNewActiveQueue;
    MESSAGEQUEUE *pOldActiveQueue = 0, *pNewActiveQueue = 0;
    WORD     wIconized = 0;
    HWND     hwndActive = 0;
    BOOL     bRet = 0;

    TRACE("(%04x, %d, %d)\n", hWnd, fMouse, fChangeFocus );

    /* Get current active window from the active queue */
    if ( hActiveQueue )
    {
        pOldActiveQueue = QUEUE_Lock( hActiveQueue );
        if ( pOldActiveQueue )
            hwndActive = PERQDATA_GetActiveWnd( pOldActiveQueue->pQData );
    }

    /* paranoid checks */
    if( hWnd == GetDesktopWindow() || (bRet = (hWnd == hwndActive)) )
	goto CLEANUP_END;

/*  if (wndPtr && (GetFastQueue16() != wndPtr->hmemTaskQ))
 *	return 0;
 */
    wndPtr = WIN_FindWndPtr(hWnd);
    hOldActiveQueue = hActiveQueue;

    if( (wndTemp = WIN_FindWndPtr(hwndActive)) )
    {
	wIconized = HIWORD(wndTemp->dwStyle & WS_MINIMIZE);
        WIN_ReleaseWndPtr(wndTemp);
    }
    else
	TRACE("no current active window.\n");

    /* call CBT hook chain */
    if ((cbtStruct = SEGPTR_NEW(CBTACTIVATESTRUCT16)))
    {
        cbtStruct->fMouse     = fMouse;
        cbtStruct->hWndActive = hwndActive;
        bRet = (BOOL)HOOK_CallHooks16( WH_CBT, HCBT_ACTIVATE, (WPARAM16)hWnd,
                                     (LPARAM)SEGPTR_GET(cbtStruct) );
        SEGPTR_FREE(cbtStruct);
        if (bRet) goto CLEANUP_END;
    }

    /* set prev active wnd to current active wnd and send notification */
    if ((hwndPrevActive = hwndActive) && IsWindow(hwndPrevActive))
    {
        MESSAGEQUEUE *pTempActiveQueue = 0;
        
        if (!SendMessageA( hwndPrevActive, WM_NCACTIVATE, FALSE, 0 ))
        {
	    if (GetSysModalWindow16() != hWnd) 
		goto CLEANUP_END;
	    /* disregard refusal if hWnd is sysmodal */
        }

	SendMessageA( hwndPrevActive, WM_ACTIVATE,
                        MAKEWPARAM( WA_INACTIVE, wIconized ),
                        (LPARAM)hWnd );

        /* check if something happened during message processing
         * (global active queue may have changed)
         */
        pTempActiveQueue = QUEUE_Lock( hActiveQueue );
	if(!pTempActiveQueue)
	    goto CLEANUP_END;

        hwndActive = PERQDATA_GetActiveWnd( pTempActiveQueue->pQData );
        QUEUE_Unlock( pTempActiveQueue );
        if( hwndPrevActive != hwndActive )
            goto CLEANUP_END;
    }

    /* Set new active window in the message queue */
    hwndActive = hWnd;
    if ( wndPtr )
    {
        pNewActiveQueue = QUEUE_Lock( wndPtr->hmemTaskQ );
        if ( pNewActiveQueue )
            PERQDATA_SetActiveWnd( pNewActiveQueue->pQData, hwndActive );
    }
    else /* have to do this or MDI frame activation goes to hell */
	if( pOldActiveQueue )
	    PERQDATA_SetActiveWnd( pOldActiveQueue->pQData, 0 );

    /* send palette messages */
    if (hWnd && SendMessage16( hWnd, WM_QUERYNEWPALETTE, 0, 0L))
	SendMessage16((HWND16)-1, WM_PALETTEISCHANGING, (WPARAM16)hWnd, 0L );

    /* if prev wnd is minimized redraw icon title */
    if( IsIconic( hwndPrevActive ) ) WINPOS_RedrawIconTitle(hwndPrevActive);

    /* managed windows will get ConfigureNotify event */  
    if (wndPtr && !(wndPtr->dwStyle & WS_CHILD) && !(wndPtr->flags & WIN_MANAGED))
    {
	/* check Z-order and bring hWnd to the top */
	for (wndTemp = WIN_LockWndPtr(WIN_GetDesktop()->child); wndTemp; WIN_UpdateWndPtr(&wndTemp,wndTemp->next))
        {
	    if (wndTemp->dwStyle & WS_VISIBLE) break;
        }
        WIN_ReleaseDesktop();
        WIN_ReleaseWndPtr(wndTemp);

	if( wndTemp != wndPtr )
	    SetWindowPos(hWnd, HWND_TOP, 0,0,0,0, 
			   SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE );
        if (!IsWindow(hWnd))  
	    goto CLEANUP;
    }

    /* Get a handle to the new active queue */
    hNewActiveQueue = wndPtr ? wndPtr->hmemTaskQ : 0;

    /* send WM_ACTIVATEAPP if necessary */
    if (hOldActiveQueue != hNewActiveQueue)
    {
        WND **list, **ppWnd;
        WND *pDesktop = WIN_GetDesktop();

        if ((list = WIN_BuildWinArray( pDesktop, 0, NULL )))
        {
            for (ppWnd = list; *ppWnd; ppWnd++)
            {
                if (!IsWindow( (*ppWnd)->hwndSelf )) continue;

                if ((*ppWnd)->hmemTaskQ == hOldActiveQueue)
                   SendMessage16( (*ppWnd)->hwndSelf, WM_ACTIVATEAPP,
                                   0, QUEUE_GetQueueTask(hNewActiveQueue) );
            }
            WIN_ReleaseWinArray(list);
        }

	hActiveQueue = hNewActiveQueue;

        if ((list = WIN_BuildWinArray(pDesktop, 0, NULL )))
        {
            for (ppWnd = list; *ppWnd; ppWnd++)
            {
                if (!IsWindow( (*ppWnd)->hwndSelf )) continue;

                if ((*ppWnd)->hmemTaskQ == hNewActiveQueue)
                   SendMessage16( (*ppWnd)->hwndSelf, WM_ACTIVATEAPP,
                                  1, QUEUE_GetQueueTask( hOldActiveQueue ) );
            }
            WIN_ReleaseWinArray(list);
        }
        WIN_ReleaseDesktop();
        
	if (hWnd && !IsWindow(hWnd)) goto CLEANUP;
    }

    if (hWnd)
    {
        /* walk up to the first unowned window */
        wndTemp = WIN_LockWndPtr(wndPtr);
        while (wndTemp->owner)
        {
            WIN_UpdateWndPtr(&wndTemp,wndTemp->owner);
        }
        /* and set last active owned popup */
        wndTemp->hwndLastActive = hWnd;

        wIconized = HIWORD(wndTemp->dwStyle & WS_MINIMIZE);
        WIN_ReleaseWndPtr(wndTemp);
        SendMessageA( hWnd, WM_NCACTIVATE, TRUE, 0 );
        SendMessageA( hWnd, WM_ACTIVATE,
		 MAKEWPARAM( (fMouse) ? WA_CLICKACTIVE : WA_ACTIVE, wIconized),
		 (LPARAM)hwndPrevActive );
        if( !IsWindow(hWnd) ) goto CLEANUP;
    }

    /* change focus if possible */
    if ( fChangeFocus )
    {
        if ( pNewActiveQueue )
        {
            HWND hOldFocus = PERQDATA_GetFocusWnd( pNewActiveQueue->pQData );

            if ( WIN_GetTopParent( hOldFocus ) != hwndActive )
                FOCUS_SwitchFocus( pNewActiveQueue, hOldFocus, 
                                   (wndPtr && (wndPtr->dwStyle & WS_MINIMIZE))?
                                   0 : hwndActive );
        }

        if ( pOldActiveQueue && 
             ( !pNewActiveQueue || 
                pNewActiveQueue->pQData != pOldActiveQueue->pQData ) )
        {
            HWND hOldFocus = PERQDATA_GetFocusWnd( pOldActiveQueue->pQData );
            if ( hOldFocus )
                FOCUS_SwitchFocus( pOldActiveQueue, hOldFocus, 0 );
        }
    }

    if( !hwndPrevActive && wndPtr )
        (*wndPtr->pDriver->pForceWindowRaise)(wndPtr);

    /* if active wnd is minimized redraw icon title */
    if( IsIconic(hwndActive) ) WINPOS_RedrawIconTitle(hwndActive);

    bRet = (hWnd == hwndActive);  /* Success? */
    
CLEANUP: /* Unlock the message queues before returning */

    if ( pNewActiveQueue )
        QUEUE_Unlock( pNewActiveQueue );

CLEANUP_END:

    if ( pOldActiveQueue )
        QUEUE_Unlock( pOldActiveQueue );

    WIN_ReleaseWndPtr(wndPtr);
    return bRet;
}

/*******************************************************************
 *         WINPOS_ActivateOtherWindow
 *
 *  Activates window other than pWnd.
 */
BOOL WINPOS_ActivateOtherWindow(WND* pWnd)
{
  BOOL	bRet = 0;
  WND*  	pWndTo = NULL;
    HWND       hwndActive = 0;

    /* Get current active window from the active queue */
    if ( hActiveQueue )
    {
        MESSAGEQUEUE *pActiveQueue = QUEUE_Lock( hActiveQueue );
        if ( pActiveQueue )
        {
            hwndActive = PERQDATA_GetActiveWnd( pActiveQueue->pQData );
            QUEUE_Unlock( pActiveQueue );
        }
    }

  if( pWnd->hwndSelf == hwndPrevActive )
      hwndPrevActive = 0;

  if( hwndActive != pWnd->hwndSelf && 
    ( hwndActive || QUEUE_IsExitingQueue(pWnd->hmemTaskQ)) )
      return 0;

  if( !(pWnd->dwStyle & WS_POPUP) || !(pWnd->owner) ||
      !WINPOS_CanActivate((pWndTo = WIN_GetTopParentPtr(pWnd->owner))) ) 
  {
      WND* pWndPtr = WIN_GetTopParentPtr(pWnd);

      WIN_ReleaseWndPtr(pWndTo);
      pWndTo = WIN_FindWndPtr(hwndPrevActive);

      while( !WINPOS_CanActivate(pWndTo) ) 
      {
	 /* by now owned windows should've been taken care of */
          WIN_UpdateWndPtr(&pWndTo,pWndPtr->next);
          WIN_UpdateWndPtr(&pWndPtr,pWndTo);
	  if( !pWndTo ) break;
      }
      WIN_ReleaseWndPtr(pWndPtr);
  }

  bRet = WINPOS_SetActiveWindow( pWndTo ? pWndTo->hwndSelf : 0, FALSE, TRUE );

  /* switch desktop queue to current active */
  if( pWndTo )
  {
      WIN_GetDesktop()->hmemTaskQ = pWndTo->hmemTaskQ;
      WIN_ReleaseWndPtr(pWndTo);
      WIN_ReleaseDesktop();
  }

  hwndPrevActive = 0;
  return bRet;  
}

/*******************************************************************
 *	   WINPOS_ChangeActiveWindow
 *
 */
BOOL WINPOS_ChangeActiveWindow( HWND hWnd, BOOL mouseMsg )
{
    WND *wndPtr, *wndTemp;
    BOOL retvalue;
    HWND hwndActive = 0;

    /* Get current active window from the active queue */
    if ( hActiveQueue )
    {
        MESSAGEQUEUE *pActiveQueue = QUEUE_Lock( hActiveQueue );
        if ( pActiveQueue )
        {
            hwndActive = PERQDATA_GetActiveWnd( pActiveQueue->pQData );
            QUEUE_Unlock( pActiveQueue );
        }
    }

    if (!hWnd)
        return WINPOS_SetActiveWindow( 0, mouseMsg, TRUE );

    wndPtr = WIN_FindWndPtr(hWnd);
    if( !wndPtr ) return FALSE;

    /* child windows get WM_CHILDACTIVATE message */
    if( (wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) == WS_CHILD )
    {
        retvalue = SendMessageA(hWnd, WM_CHILDACTIVATE, 0, 0L);
        goto end;
    }

    if( hWnd == hwndActive )
    {
        retvalue = FALSE;
        goto end;
    }

    if( !WINPOS_SetActiveWindow(hWnd ,mouseMsg ,TRUE) )
    {
        retvalue = FALSE;
        goto end;
    }

    /* switch desktop queue to current active */
    wndTemp = WIN_GetDesktop();
    if( wndPtr->parent == wndTemp)
        wndTemp->hmemTaskQ = wndPtr->hmemTaskQ;
    WIN_ReleaseDesktop();

    retvalue = TRUE;
end:
    WIN_ReleaseWndPtr(wndPtr);
    return retvalue;
}


/***********************************************************************
 *           WINPOS_SendNCCalcSize
 *
 * Send a WM_NCCALCSIZE message to a window.
 * All parameters are read-only except newClientRect.
 * oldWindowRect, oldClientRect and winpos must be non-NULL only
 * when calcValidRect is TRUE.
 */
LONG WINPOS_SendNCCalcSize( HWND hwnd, BOOL calcValidRect,
                            RECT *newWindowRect, RECT *oldWindowRect,
                            RECT *oldClientRect, WINDOWPOS *winpos,
                            RECT *newClientRect )
{
    NCCALCSIZE_PARAMS params;
    WINDOWPOS winposCopy;
    LONG result;

    params.rgrc[0] = *newWindowRect;
    if (calcValidRect)
    {
        winposCopy = *winpos;
	params.rgrc[1] = *oldWindowRect;
	params.rgrc[2] = *oldClientRect;
	params.lppos = &winposCopy;
    }
    result = SendMessageA( hwnd, WM_NCCALCSIZE, calcValidRect,
                             (LPARAM)&params );
    TRACE("%d,%d-%d,%d\n",
                 params.rgrc[0].left, params.rgrc[0].top,
                 params.rgrc[0].right, params.rgrc[0].bottom );

    /* If the application send back garbage, ignore it */
    if (params.rgrc[0].left <= params.rgrc[0].right && params.rgrc[0].top <= params.rgrc[0].bottom)
        *newClientRect = params.rgrc[0];

    return result;
}


/***********************************************************************
 *           WINPOS_HandleWindowPosChanging16
 *
 * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
 */
LONG WINPOS_HandleWindowPosChanging16( WND *wndPtr, WINDOWPOS16 *winpos )
{
    POINT maxSize, minTrack;
    if (winpos->flags & SWP_NOSIZE) return 0;
    if ((wndPtr->dwStyle & WS_THICKFRAME) ||
	((wndPtr->dwStyle & (WS_POPUP | WS_CHILD)) == 0))
    {
	WINPOS_GetMinMaxInfo( wndPtr, &maxSize, NULL, &minTrack, NULL );
	if (maxSize.x < winpos->cx) winpos->cx = maxSize.x;
	if (maxSize.y < winpos->cy) winpos->cy = maxSize.y;
	if (!(wndPtr->dwStyle & WS_MINIMIZE))
	{
	    if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
	    if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
	}
    }
    return 0;
}


/***********************************************************************
 *           WINPOS_HandleWindowPosChanging
 *
 * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
 */
LONG WINPOS_HandleWindowPosChanging( WND *wndPtr, WINDOWPOS *winpos )
{
    POINT maxSize;
    if (winpos->flags & SWP_NOSIZE) return 0;
    if ((wndPtr->dwStyle & WS_THICKFRAME) ||
	((wndPtr->dwStyle & (WS_POPUP | WS_CHILD)) == 0))
    {
	WINPOS_GetMinMaxInfo( wndPtr, &maxSize, NULL, NULL, NULL );
	winpos->cx = MIN( winpos->cx, maxSize.x );
	winpos->cy = MIN( winpos->cy, maxSize.y );
    }
    return 0;
}

/***********************************************************************
 *           SWP_DoOwnedPopups
 *
 * fix Z order taking into account owned popups -
 * basically we need to maintain them above the window that owns them
 *
 * FIXME: hide/show owned popups when owner visibility changes.
 */
static HWND SWP_DoOwnedPopups(WND* pDesktop, WND* wndPtr, HWND hwndInsertAfter, WORD flags)
{
    WND* 	w = WIN_LockWndPtr(pDesktop->child);

    WARN("(%04x) hInsertAfter = %04x\n", wndPtr->hwndSelf, hwndInsertAfter );

    if( (wndPtr->dwStyle & WS_POPUP) && wndPtr->owner )
    {
	/* make sure this popup stays above the owner */

	HWND hwndLocalPrev = HWND_TOP;

	if( hwndInsertAfter != HWND_TOP )
	{
	    while( w != wndPtr->owner )
	    {
		if (w != wndPtr) hwndLocalPrev = w->hwndSelf;
		if( hwndLocalPrev == hwndInsertAfter ) break;
		WIN_UpdateWndPtr(&w,w->next);
	    }
	    hwndInsertAfter = hwndLocalPrev;
	}
    }
    else if( wndPtr->dwStyle & WS_CHILD )
	goto END; 

    WIN_UpdateWndPtr(&w, pDesktop->child);

    while( w )
    {
	if( w == wndPtr ) break; 

	if( (w->dwStyle & WS_POPUP) && w->owner == wndPtr )
	{
	    SetWindowPos(w->hwndSelf, hwndInsertAfter, 0, 0, 0, 0, 
		 SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOSENDCHANGING | SWP_DEFERERASE);
	    hwndInsertAfter = w->hwndSelf;
	}
	WIN_UpdateWndPtr(&w, w->next);
    }

END:
    WIN_ReleaseWndPtr(w);
    return hwndInsertAfter;
}

/***********************************************************************
 *	     SWP_CopyValidBits
 *
 * Make window look nice without excessive repainting
 *
 * visible and update regions are in window coordinates
 * client and window rectangles are in parent client coordinates
 *
 * FIXME: SWP_EX_PAINTSELF in uFlags works only if both old and new
 *	  window rects have the same origin.
 *
 * Returns: uFlags and a dirty region in *pVisRgn.
 */
static UINT SWP_CopyValidBits( WND* Wnd, HRGN* pVisRgn,
                               LPRECT lpOldWndRect,
                               LPRECT lpOldClientRect, UINT uFlags )
{
 RECT r;
 HRGN newVisRgn, dirtyRgn;
 INT  my = COMPLEXREGION;

 TRACE("\tnew wnd=(%i %i-%i %i) old wnd=(%i %i-%i %i), %04x\n",
	      Wnd->rectWindow.left, Wnd->rectWindow.top,
	      Wnd->rectWindow.right, Wnd->rectWindow.bottom,
	      lpOldWndRect->left, lpOldWndRect->top,
	      lpOldWndRect->right, lpOldWndRect->bottom, *pVisRgn);
 TRACE("\tnew client=(%i %i-%i %i) old client=(%i %i-%i %i)\n",
	      Wnd->rectClient.left, Wnd->rectClient.top,
	      Wnd->rectClient.right, Wnd->rectClient.bottom,
	      lpOldClientRect->left, lpOldClientRect->top,
	      lpOldClientRect->right,lpOldClientRect->bottom );

 if( Wnd->hrgnUpdate == 1 )
     uFlags |= SWP_EX_NOCOPY; /* whole window is invalid, nothing to copy */

 newVisRgn = DCE_GetVisRgn( Wnd->hwndSelf, DCX_WINDOW | DCX_CLIPSIBLINGS, 0, 0);
 dirtyRgn = CreateRectRgn( 0, 0, 0, 0 );

 if( !(uFlags & SWP_EX_NOCOPY) ) /* make sure dst region covers only valid bits */
     my = CombineRgn( dirtyRgn, newVisRgn, *pVisRgn, RGN_AND );

 if( (my == NULLREGION) || (uFlags & SWP_EX_NOCOPY) )
 {
nocopy:

     TRACE("\twon't copy anything!\n");

     /* set dirtyRgn to the sum of old and new visible regions 
      * in parent client coordinates */

     OffsetRgn( newVisRgn, Wnd->rectWindow.left, Wnd->rectWindow.top );
     OffsetRgn( *pVisRgn, lpOldWndRect->left, lpOldWndRect->top );

     CombineRgn(*pVisRgn, *pVisRgn, newVisRgn, RGN_OR );
 }
 else			/* copy valid bits to a new location */
 {
     INT  dx, dy, ow, oh, nw, nh, ocw, ncw, och, nch;
     HRGN hrgnValid = dirtyRgn; /* non-empty intersection of old and new visible rgns */

     /* subtract already invalid region inside Wnd from the dst region */

     if( Wnd->hrgnUpdate )
         if( CombineRgn( hrgnValid, hrgnValid, Wnd->hrgnUpdate, RGN_DIFF) == NULLREGION )
	     goto nocopy;

     /* check if entire window can be copied */

     ow = lpOldWndRect->right - lpOldWndRect->left;
     oh = lpOldWndRect->bottom - lpOldWndRect->top;
     nw = Wnd->rectWindow.right - Wnd->rectWindow.left;
     nh = Wnd->rectWindow.bottom - Wnd->rectWindow.top;

     ocw = lpOldClientRect->right - lpOldClientRect->left;
     och = lpOldClientRect->bottom - lpOldClientRect->top;
     ncw = Wnd->rectClient.right  - Wnd->rectClient.left;
     nch = Wnd->rectClient.bottom  - Wnd->rectClient.top;

     if(  (ocw != ncw) || (och != nch) ||
	  ( ow !=  nw) || ( oh !=  nh) ||
	  ((lpOldClientRect->top - lpOldWndRect->top)   != 
	   (Wnd->rectClient.top - Wnd->rectWindow.top)) ||
          ((lpOldClientRect->left - lpOldWndRect->left) !=
           (Wnd->rectClient.left - Wnd->rectWindow.left)) )
     {
	dx = Wnd->rectClient.left - lpOldClientRect->left;
	dy = Wnd->rectClient.top - lpOldClientRect->top;

	/* restrict valid bits to the common client rect */

	r.left = Wnd->rectClient.left - Wnd->rectWindow.left;
        r.top = Wnd->rectClient.top  - Wnd->rectWindow.top;
	r.right = r.left + MIN( ocw, ncw );
	r.bottom = r.top + MIN( och, nch );

	REGION_CropRgn( hrgnValid, hrgnValid, &r, 
			(uFlags & SWP_EX_PAINTSELF) ? NULL : (POINT*)&(Wnd->rectWindow));
	GetRgnBox( hrgnValid, &r );
	if( IsRectEmpty( &r ) )
	    goto nocopy;
	r = *lpOldClientRect;
     }
     else
     {
	dx = Wnd->rectWindow.left - lpOldWndRect->left;
	dy = Wnd->rectWindow.top -  lpOldWndRect->top;
	if( !(uFlags & SWP_EX_PAINTSELF) )
	    OffsetRgn( hrgnValid, Wnd->rectWindow.left, Wnd->rectWindow.top );
	r = *lpOldWndRect;
     }

     if( !(uFlags & SWP_EX_PAINTSELF) )
     {
	/* Move remaining regions to parent coordinates */
	OffsetRgn( newVisRgn, Wnd->rectWindow.left, Wnd->rectWindow.top );
	OffsetRgn( *pVisRgn,  lpOldWndRect->left, lpOldWndRect->top );
     }
     else
	OffsetRect( &r, -lpOldWndRect->left, -lpOldWndRect->top );

     TRACE("\tcomputing dirty region!\n");

     /* Compute combined dirty region (old + new - valid) */
     CombineRgn( *pVisRgn, *pVisRgn, newVisRgn, RGN_OR);
     CombineRgn( *pVisRgn, *pVisRgn, hrgnValid, RGN_DIFF);

     /* Blt valid bits, r is the rect to copy  */

     if( dx || dy )
     {
	 RECT rClip;
	 HDC hDC;
	 DC* dc;

	 /* get DC and clip rect with drawable rect to avoid superfluous expose events
	    from copying clipped areas */

	 if( uFlags & SWP_EX_PAINTSELF )
	 {
	     hDC = GetDCEx( Wnd->hwndSelf, hrgnValid, DCX_WINDOW | DCX_CACHE |
			    DCX_KEEPCLIPRGN | DCX_INTERSECTRGN | DCX_CLIPSIBLINGS );
	     rClip.right = nw; rClip.bottom = nh;
	 }
	 else
	 {
	     hDC = GetDCEx( Wnd->parent->hwndSelf, hrgnValid, DCX_CACHE |
			    DCX_KEEPCLIPRGN | DCX_INTERSECTRGN | DCX_CLIPSIBLINGS );
	     rClip.right = Wnd->parent->rectClient.right - Wnd->parent->rectClient.left;
	     rClip.bottom = Wnd->parent->rectClient.bottom - Wnd->parent->rectClient.top;
	 }
	 rClip.left = rClip.top = 0;    

	 if( (dc = (DC *)GDI_GetObjPtr(hDC, DC_MAGIC)) )
	 {
	    if( oh > nh ) r.bottom = r.top  + nh;
	    if( ow < nw ) r.right = r.left  + nw;

	    if( IntersectRect( &r, &r, &rClip ) )
            {
	        Wnd->pDriver->pSurfaceCopy( Wnd->parent, dc, dx, dy, &r, TRUE );

                 /* When you copy the bits without repainting, parent doesn't
                    get validated appropriately. Therefore, we have to validate
                    the parent with the windows' updated region when the
                    parent's update region is not empty. */

                if (Wnd->parent->hrgnUpdate != 0 && !(Wnd->parent->dwStyle & WS_CLIPCHILDREN))
                {
                  OffsetRect(&r, dx, dy);
                  ValidateRect(Wnd->parent->hwndSelf, &r);
                }
            }

	    GDI_HEAP_UNLOCK( hDC );
	 }
         ReleaseDC( (uFlags & SWP_EX_PAINTSELF) ? 
		     Wnd->hwndSelf :  Wnd->parent->hwndSelf, hDC); 
     }
 }

 /* *pVisRgn now points to the invalidated region */

 DeleteObject(newVisRgn);
 DeleteObject(dirtyRgn);
 return uFlags;
}

/***********************************************************************
 *           SWP_DoSimpleFrameChanged
 *
 * NOTE: old and new client rect origins are identical, only
 *	 extents may have changed. Window extents are the same.
 */
static void SWP_DoSimpleFrameChanged( WND* wndPtr, RECT* pOldClientRect, WORD swpFlags, UINT uFlags )
{
    INT	 i = 0;
    RECT rect;
    HRGN hrgn = 0;

    if( !(swpFlags & SWP_NOCLIENTSIZE) )
    {
	/* Client rect changed its position/size, most likely a scrollar
	 * was added/removed.
	 *
	 * FIXME: WVR alignment flags 
	 */

	if( wndPtr->rectClient.right >  pOldClientRect->right ) /* right edge */
	{
	    i++;
	    rect.top = 0; 
	    rect.bottom = wndPtr->rectClient.bottom - wndPtr->rectClient.top;
	    rect.right = wndPtr->rectClient.right - wndPtr->rectClient.left;
	    if(!(uFlags & SWP_EX_NOCOPY))
		rect.left = pOldClientRect->right - wndPtr->rectClient.left;
	    else
	    {
		rect.left = 0;
		goto redraw;
	    }
	}

	if( wndPtr->rectClient.bottom > pOldClientRect->bottom ) /* bottom edge */
	{
	    if( i )
		hrgn = CreateRectRgnIndirect( &rect );
	    rect.left = 0;
	    rect.right = wndPtr->rectClient.right - wndPtr->rectClient.left;
	    rect.bottom = wndPtr->rectClient.bottom - wndPtr->rectClient.top;
	    if(!(uFlags & SWP_EX_NOCOPY))
		rect.top = pOldClientRect->bottom - wndPtr->rectClient.top;
	    else
		rect.top = 0;
	    if( i++ ) 
		REGION_UnionRectWithRgn( hrgn, &rect );
	}

	if( i == 0 && (uFlags & SWP_EX_NOCOPY) ) /* force redraw anyway */
	{
	    rect = wndPtr->rectWindow;
	    OffsetRect( &rect, wndPtr->rectWindow.left - wndPtr->rectClient.left,
			       wndPtr->rectWindow.top - wndPtr->rectClient.top );
	    i++;
	}
    }

    if( i )
    {
redraw:
	PAINT_RedrawWindow( wndPtr->hwndSelf, &rect, hrgn, RDW_INVALIDATE | RDW_FRAME | RDW_ERASE |
			    RDW_ERASENOW | RDW_ALLCHILDREN, RDW_EX_TOPFRAME | RDW_EX_USEHRGN );
    }
    else
    {
	WIN_UpdateNCRgn(wndPtr, 0, UNC_UPDATE | UNC_ENTIRE);
    }

    if( hrgn > 1 )
	DeleteObject( hrgn );
}

/***********************************************************************
 *           SWP_DoWinPosChanging
 */
static BOOL SWP_DoWinPosChanging( WND* wndPtr, WINDOWPOS* pWinpos, 
				  RECT* pNewWindowRect, RECT* pNewClientRect )
{
      /* Send WM_WINDOWPOSCHANGING message */

    if (!(pWinpos->flags & SWP_NOSENDCHANGING))
        SendMessageA( wndPtr->hwndSelf, WM_WINDOWPOSCHANGING, 0, (LPARAM)pWinpos );

      /* Calculate new position and size */

    *pNewWindowRect = wndPtr->rectWindow;
    *pNewClientRect = (wndPtr->dwStyle & WS_MINIMIZE) ? wndPtr->rectWindow
                                                    : wndPtr->rectClient;

    if (!(pWinpos->flags & SWP_NOSIZE))
    {
        pNewWindowRect->right  = pNewWindowRect->left + pWinpos->cx;
        pNewWindowRect->bottom = pNewWindowRect->top + pWinpos->cy;
    }
    if (!(pWinpos->flags & SWP_NOMOVE))
    {
        pNewWindowRect->left    = pWinpos->x;
        pNewWindowRect->top     = pWinpos->y;
        pNewWindowRect->right  += pWinpos->x - wndPtr->rectWindow.left;
        pNewWindowRect->bottom += pWinpos->y - wndPtr->rectWindow.top;

        OffsetRect( pNewClientRect, pWinpos->x - wndPtr->rectWindow.left,
                                    pWinpos->y - wndPtr->rectWindow.top );
    }

    pWinpos->flags |= SWP_NOCLIENTMOVE | SWP_NOCLIENTSIZE;
    return TRUE;
}

/***********************************************************************
 *           SWP_DoNCCalcSize
 */
static UINT SWP_DoNCCalcSize( WND* wndPtr, WINDOWPOS* pWinpos,
			      RECT* pNewWindowRect, RECT* pNewClientRect, WORD f)
{
    UINT wvrFlags = 0;

      /* Send WM_NCCALCSIZE message to get new client area */
    if( (pWinpos->flags & (SWP_FRAMECHANGED | SWP_NOSIZE)) != SWP_NOSIZE )
    {
         wvrFlags = WINPOS_SendNCCalcSize( pWinpos->hwnd, TRUE, pNewWindowRect,
                                    &wndPtr->rectWindow, &wndPtr->rectClient,
                                    pWinpos, pNewClientRect );

         /* FIXME: WVR_ALIGNxxx */

         if( pNewClientRect->left != wndPtr->rectClient.left ||
             pNewClientRect->top != wndPtr->rectClient.top )
             pWinpos->flags &= ~SWP_NOCLIENTMOVE;

         if( (pNewClientRect->right - pNewClientRect->left !=
              wndPtr->rectClient.right - wndPtr->rectClient.left) ||
             (pNewClientRect->bottom - pNewClientRect->top !=
              wndPtr->rectClient.bottom - wndPtr->rectClient.top) )
             pWinpos->flags &= ~SWP_NOCLIENTSIZE;
    }
    else
      if( !(f & SWP_NOMOVE) && (pNewClientRect->left != wndPtr->rectClient.left ||
                                pNewClientRect->top != wndPtr->rectClient.top) )
            pWinpos->flags &= ~SWP_NOCLIENTMOVE;
    return wvrFlags;
}

/***********************************************************************
 *           SetWindowPos   (USER.2)
 */
BOOL16 WINAPI SetWindowPos16( HWND16 hwnd, HWND16 hwndInsertAfter,
                              INT16 x, INT16 y, INT16 cx, INT16 cy, WORD flags)
{
    return SetWindowPos(hwnd,(INT)(INT16)hwndInsertAfter,x,y,cx,cy,flags);
}

/***********************************************************************
 *           SetWindowPos   (USER32.520)
 */
BOOL WINAPI SetWindowPos( HWND hwnd, HWND hwndInsertAfter,
                          INT x, INT y, INT cx, INT cy, UINT flags )
{
    WINDOWPOS 	winpos;
    WND *	wndPtr,*wndTemp;
    RECT 	newWindowRect, newClientRect;
    RECT	oldWindowRect, oldClientRect;
    HRGN	visRgn = 0;
    UINT 	wvrFlags = 0, uFlags = 0;
    BOOL	retvalue, resync = FALSE, bChangePos;
    HWND	hwndActive = 0;

    /* Get current active window from the active queue */
    if ( hActiveQueue )
    {
        MESSAGEQUEUE *pActiveQueue = QUEUE_Lock( hActiveQueue );
        if ( pActiveQueue )
        {
            hwndActive = PERQDATA_GetActiveWnd( pActiveQueue->pQData );
            QUEUE_Unlock( pActiveQueue );
        }
    }

    TRACE("hwnd %04x, swp (%i,%i)-(%i,%i) flags %08x\n", 
						 hwnd, x, y, x+cx, y+cy, flags);  

    bChangePos = !(flags & SWP_WINE_NOHOSTMOVE);
    flags &= ~SWP_WINE_NOHOSTMOVE;


      /* ------------------------------------------------------------------------ CHECKS */

      /* Check window handle */

    if (hwnd == GetDesktopWindow()) return FALSE;
    if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;

    TRACE("\tcurrent (%i,%i)-(%i,%i), style %08x\n", wndPtr->rectWindow.left, wndPtr->rectWindow.top,
			  wndPtr->rectWindow.right, wndPtr->rectWindow.bottom, (unsigned)wndPtr->dwStyle );

      /* Fix redundant flags */

    if(wndPtr->dwStyle & WS_VISIBLE)
        flags &= ~SWP_SHOWWINDOW;
    else
    {
	if (!(flags & SWP_SHOWWINDOW)) 
	      flags |= SWP_NOREDRAW;
	flags &= ~SWP_HIDEWINDOW;
    }

    if ( cx < 0 ) cx = 0; if( cy < 0 ) cy = 0;

    if ((wndPtr->rectWindow.right - wndPtr->rectWindow.left == cx) &&
        (wndPtr->rectWindow.bottom - wndPtr->rectWindow.top == cy))
        flags |= SWP_NOSIZE;    /* Already the right size */

    if ((wndPtr->rectWindow.left == x) && (wndPtr->rectWindow.top == y))
        flags |= SWP_NOMOVE;    /* Already the right position */

    if (hwnd == hwndActive)
        flags |= SWP_NOACTIVATE;   /* Already active */
    else if ( (wndPtr->dwStyle & (WS_POPUP | WS_CHILD)) != WS_CHILD )
    {
        if(!(flags & SWP_NOACTIVATE)) /* Bring to the top when activating */
        {
            flags &= ~SWP_NOZORDER;
 	    hwndInsertAfter = HWND_TOP;           
	    goto Pos;
        }
    }

      /* Check hwndInsertAfter */

      /* FIXME: TOPMOST not supported yet */
    if ((hwndInsertAfter == HWND_TOPMOST) ||
        (hwndInsertAfter == HWND_NOTOPMOST)) hwndInsertAfter = HWND_TOP;

      /* hwndInsertAfter must be a sibling of the window */
    if ((hwndInsertAfter != HWND_TOP) && (hwndInsertAfter != HWND_BOTTOM))
    {
	 WND* wnd = WIN_FindWndPtr(hwndInsertAfter);

	 if( wnd ) {
             if( wnd->parent != wndPtr->parent )
             {
                 retvalue = FALSE;
                 WIN_ReleaseWndPtr(wnd);
                 goto END;
             }
	   if( wnd->next == wndPtr ) flags |= SWP_NOZORDER;
	 }
         WIN_ReleaseWndPtr(wnd);
    }

Pos:  /* ------------------------------------------------------------------------ MAIN part */

      /* Fill the WINDOWPOS structure */

    winpos.hwnd = hwnd;
    winpos.hwndInsertAfter = hwndInsertAfter;
    winpos.x = x;
    winpos.y = y;
    winpos.cx = cx;
    winpos.cy = cy;
    winpos.flags = flags;
    
    SWP_DoWinPosChanging( wndPtr, &winpos, &newWindowRect, &newClientRect );

    if((winpos.flags & (SWP_NOZORDER | SWP_HIDEWINDOW | SWP_SHOWWINDOW)) != SWP_NOZORDER)
    {
	if( wndPtr->parent == WIN_GetDesktop() )
	    hwndInsertAfter = SWP_DoOwnedPopups( wndPtr->parent, wndPtr,
					hwndInsertAfter, winpos.flags );
	WIN_ReleaseDesktop();
    }

    if(!(wndPtr->flags & WIN_NATIVE) )
    {
	if( hwndInsertAfter == HWND_TOP )
           winpos.flags |= ( wndPtr->parent->child == wndPtr)? SWP_NOZORDER: 0;
	else
	if( hwndInsertAfter == HWND_BOTTOM )
	   winpos.flags |= ( wndPtr->next )? 0: SWP_NOZORDER;
	else
	if( !(winpos.flags & SWP_NOZORDER) )
	   if( GetWindow(hwndInsertAfter, GW_HWNDNEXT) == wndPtr->hwndSelf )
	       winpos.flags |= SWP_NOZORDER;

	if( !(winpos.flags & (SWP_NOREDRAW | SWP_SHOWWINDOW)) &&
	    ((winpos.flags & (SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_HIDEWINDOW | SWP_FRAMECHANGED))
			  != (SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER)) )
	{
	    /* get a previous visible region for SWP_CopyValidBits() */
	    DWORD flags = DCX_WINDOW;
  
            if (wndPtr->dwStyle & WS_CLIPSIBLINGS)
               flags |= DCX_CLIPSIBLINGS;

	    visRgn = DCE_GetVisRgn(hwnd, flags, 0, 0);
	}
    }

    /* Common operations */

    wvrFlags = SWP_DoNCCalcSize( wndPtr, &winpos, &newWindowRect, &newClientRect, flags );

    if(!(winpos.flags & SWP_NOZORDER) && winpos.hwnd != hwndInsertAfter)
    {
        if ( WIN_UnlinkWindow( winpos.hwnd ) )
	   WIN_LinkWindow( winpos.hwnd, hwndInsertAfter );
    }

    /* Reset active DCEs */

    if( (((winpos.flags & SWP_AGG_NOPOSCHANGE) != SWP_AGG_NOPOSCHANGE) && 
					 wndPtr->dwStyle & WS_VISIBLE) || 
	(flags & (SWP_HIDEWINDOW | SWP_SHOWWINDOW)) ) 
    {
        RECT rect;

        UnionRect(&rect, &newWindowRect, &wndPtr->rectWindow);
	DCE_InvalidateDCE(wndPtr, &rect);
    }

    oldWindowRect = wndPtr->rectWindow;
    oldClientRect = wndPtr->rectClient;

    /* Find out if we have to redraw the whole client rect */

    if( oldClientRect.bottom - oldClientRect.top ==
        newClientRect.bottom - newClientRect.top ) wvrFlags &= ~WVR_VREDRAW;

    if( oldClientRect.right - oldClientRect.left ==
        newClientRect.right - newClientRect.left ) wvrFlags &= ~WVR_HREDRAW;

    if( (winpos.flags & SWP_NOCOPYBITS) || (!(winpos.flags & SWP_NOCLIENTSIZE) &&
	   (wvrFlags >= WVR_HREDRAW) && (wvrFlags < WVR_VALIDRECTS)) )
    {
	uFlags |= SWP_EX_NOCOPY;
    }
/* 
 *  Use this later in CopyValidBits()
 *
    else if( 0  )
	uFlags |= SWP_EX_NONCLIENT; 
 */

    /* FIXME: actually do something with WVR_VALIDRECTS */

    wndPtr->rectWindow = newWindowRect;
    wndPtr->rectClient = newClientRect;

    if (wndPtr->flags & WIN_NATIVE) 	/* -------------------------------------------- hosted window */
    {
	BOOL bCallDriver = TRUE;
        HWND tempInsertAfter = winpos.hwndInsertAfter;

        winpos.hwndInsertAfter = hwndInsertAfter;

	if( !(winpos.flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW | SWP_NOREDRAW)) )
        {
	  /* This is the only place where we need to force repainting of the contents
	     of windows created by the host window system, all other cases go through the
	     expose event handling */

	    if( (winpos.flags & (SWP_NOSIZE | SWP_FRAMECHANGED)) == (SWP_NOSIZE | SWP_FRAMECHANGED) )
	    {
		cx = newWindowRect.right - newWindowRect.left;
		cy = newWindowRect.bottom - newWindowRect.top;

		wndPtr->pDriver->pSetWindowPos(wndPtr, &winpos, bChangePos);
		winpos.hwndInsertAfter = tempInsertAfter;
		bCallDriver = FALSE;

		if( winpos.flags & SWP_NOCLIENTMOVE )
		    SWP_DoSimpleFrameChanged(wndPtr, &oldClientRect, winpos.flags, uFlags );
		else
		{
		    /* client area moved but window extents remained the same, copy valid bits */

		    visRgn = CreateRectRgn( 0, 0, cx, cy );
		    uFlags = SWP_CopyValidBits( wndPtr, &visRgn, &oldWindowRect, &oldClientRect, 
						uFlags | SWP_EX_PAINTSELF );
		}
	    }
	}

	if( bCallDriver )
	{
	    if( !(winpos.flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW | SWP_NOREDRAW)) )
	    {
		if( (oldClientRect.left - oldWindowRect.left == newClientRect.left - newWindowRect.left) &&
		    (oldClientRect.top - oldWindowRect.top == newClientRect.top - newWindowRect.top) &&
		   !(uFlags & SWP_EX_NOCOPY) )
		{
		  /* The origin of the client rect didn't move so we can try to repaint
		   * only the nonclient area by setting bit gravity hint for the host window system.
		   */

		    if( !(wndPtr->flags & WIN_MANAGED) )
		    {
			HRGN hrgn = CreateRectRgn( 0, 0, newWindowRect.right - newWindowRect.left,
						     newWindowRect.bottom - newWindowRect.top);
			RECT rcn = newClientRect;
			RECT rco = oldClientRect;

			OffsetRect( &rcn, -newWindowRect.left, -newWindowRect.top );
			OffsetRect( &rco, -oldWindowRect.left, -oldWindowRect.top );
			IntersectRect( &rcn, &rcn, &rco );
			visRgn = CreateRectRgnIndirect( &rcn );
			CombineRgn( visRgn, hrgn, visRgn, RGN_DIFF );
			DeleteObject( hrgn );
			uFlags = SWP_EX_PAINTSELF;
		    }
		    wndPtr->pDriver->pSetHostAttr(wndPtr, HAK_BITGRAVITY, BGNorthWest );
	 	}
		else
		    wndPtr->pDriver->pSetHostAttr(wndPtr, HAK_BITGRAVITY, BGForget );
	    }

	    wndPtr->pDriver->pSetWindowPos(wndPtr, &winpos, bChangePos);
	    winpos.hwndInsertAfter = tempInsertAfter;
	}

	if( winpos.flags & SWP_SHOWWINDOW )
	{
		HWND focus, curr;

		wndPtr->dwStyle |= WS_VISIBLE;

		if (wndPtr->flags & WIN_MANAGED) resync = TRUE; 

		/* focus was set to unmapped window, reset host focus 
		 * since the window is now visible */

		focus = curr = GetFocus();
		while (curr) 
		{
	    	    if (curr == hwnd) 
	   	    {
			WND *pFocus = WIN_FindWndPtr( focus );
			if (pFocus)
		    	    pFocus->pDriver->pSetFocus(pFocus);
			WIN_ReleaseWndPtr(pFocus);
			break;
	    	    }
                    curr = GetParent(curr);
                }
        }
    }
    else 				/* -------------------------------------------- emulated window */
    {
	    if( winpos.flags & SWP_SHOWWINDOW )
	    {
		wndPtr->dwStyle |= WS_VISIBLE;
		uFlags |= SWP_EX_PAINTSELF;
		visRgn = 1; /* redraw the whole window */
	    }
	    else if( !(winpos.flags & SWP_NOREDRAW) )
	    {
		if( winpos.flags & SWP_HIDEWINDOW )
		{
		    if( visRgn > 1 ) /* map to parent */
			OffsetRgn( visRgn, oldWindowRect.left, oldWindowRect.top );
		    else
			visRgn = 0;
		}
		else
		{
		    if( (winpos.flags & SWP_AGG_NOPOSCHANGE) != SWP_AGG_NOPOSCHANGE )
		         uFlags = SWP_CopyValidBits(wndPtr, &visRgn, &oldWindowRect, 
							    &oldClientRect, uFlags);
	            else
		    {
			/* nothing moved, redraw frame if needed */
			 
		        if( winpos.flags & SWP_FRAMECHANGED )
			    SWP_DoSimpleFrameChanged( wndPtr, &oldClientRect, winpos.flags, uFlags );
		        if( visRgn )
		        {
			    DeleteObject( visRgn );
			    visRgn = 0;
		        } 
		    }
		}
	    }
    }

    if( winpos.flags & SWP_HIDEWINDOW )
    {
	wndPtr->dwStyle &= ~WS_VISIBLE;

	if (hwnd == CARET_GetHwnd()) DestroyCaret();
    }

    /* ------------------------------------------------------------------------ FINAL */

    if (wndPtr->flags & WIN_NATIVE)
        EVENT_Synchronize();  /* Synchronize with the host window system */

    if (!GetCapture() && ((wndPtr->dwStyle & WS_VISIBLE) || (flags & SWP_HIDEWINDOW)))
    { 
        /* Simulate a mouse event to set the cursor */
	int iWndsLocks = WIN_SuspendWndsLock();
	
	hardware_event( WM_MOUSEMOVE, GET_KEYSTATE(), 0,
		        PosX, PosY, GetTickCount(), 0 );
	
	WIN_RestoreWndsLock(iWndsLocks);
    }

    wndTemp = WIN_GetDesktop();

    /* repaint invalidated region (if any) 
     *
     * FIXME: if SWP_NOACTIVATE is not set then set invalid regions here without any painting
     *        and force update after ChangeActiveWindow() to avoid painting frames twice.
     */

    if( visRgn )
    {
	if( !(winpos.flags & SWP_NOREDRAW) )
	{
 
	    /*  Use PAINT_RedrawWindow to explicitly force an invalidation of the window,
		its parent and sibling and so on, and then erase the parent window 
		back ground if the parent is either a top-level window or its parent's parent  
		is top-level window. Rely on the system to repaint other affected 
		windows later on.  */ 
	    if( uFlags & SWP_EX_PAINTSELF )
	    {
		PAINT_RedrawWindow( wndPtr->hwndSelf, NULL, (visRgn == 1) ? 0 : visRgn, 
				RDW_ERASE | RDW_FRAME | RDW_INVALIDATE | RDW_ALLCHILDREN,
				RDW_EX_XYWINDOW | RDW_EX_USEHRGN );
	    }
	    else
	    {
		    PAINT_RedrawWindow( wndPtr->parent->hwndSelf, NULL, (visRgn == 1) ? 0 : visRgn, 
				RDW_ERASE | RDW_INVALIDATE | RDW_ALLCHILDREN, 
				RDW_EX_USEHRGN );
	    }

	    if(wndPtr -> parent == wndTemp || wndPtr->parent->parent == wndTemp )
		{
		PAINT_RedrawWindow( wndPtr->parent->hwndSelf, NULL, 0, 
    				RDW_ERASENOW | RDW_NOCHILDREN, 0 );
	    }
        }
	if( visRgn != 1 )
	    DeleteObject( visRgn );
    }

    WIN_ReleaseDesktop();

    if (!(flags & SWP_NOACTIVATE))
            WINPOS_ChangeActiveWindow( winpos.hwnd, FALSE );

      /* And last, send the WM_WINDOWPOSCHANGED message */

    TRACE("\tstatus flags = %04x\n", winpos.flags & SWP_AGG_STATUSFLAGS);

    if ( resync ||
        (((winpos.flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOPOSCHANGE) && 
         !(winpos.flags & SWP_NOSENDCHANGING)) )
    {
        SendMessageA( winpos.hwnd, WM_WINDOWPOSCHANGED, 0, (LPARAM)&winpos );
        if (resync) EVENT_Synchronize();
    }

    retvalue = TRUE;
END:
    WIN_ReleaseWndPtr(wndPtr);
    return retvalue;
}

					
/***********************************************************************
 *           BeginDeferWindowPos16   (USER.259)
 */
HDWP16 WINAPI BeginDeferWindowPos16( INT16 count )
{
    return BeginDeferWindowPos( count );
}


/***********************************************************************
 *           BeginDeferWindowPos   (USER32.9)
 */
HDWP WINAPI BeginDeferWindowPos( INT count )
{
    HDWP handle;
    DWP *pDWP;

    if (count <= 0) return 0;
    handle = USER_HEAP_ALLOC( sizeof(DWP) + (count-1)*sizeof(WINDOWPOS) );
    if (!handle) return 0;
    pDWP = (DWP *) USER_HEAP_LIN_ADDR( handle );
    pDWP->actualCount    = 0;
    pDWP->suggestedCount = count;
    pDWP->valid          = TRUE;
    pDWP->wMagic         = DWP_MAGIC;
    pDWP->hwndParent     = 0;
    return handle;
}


/***********************************************************************
 *           DeferWindowPos16   (USER.260)
 */
HDWP16 WINAPI DeferWindowPos16( HDWP16 hdwp, HWND16 hwnd, HWND16 hwndAfter,
                                INT16 x, INT16 y, INT16 cx, INT16 cy,
                                UINT16 flags )
{
    return DeferWindowPos( hdwp, hwnd, (INT)(INT16)hwndAfter,
                             x, y, cx, cy, flags );
}


/***********************************************************************
 *           DeferWindowPos   (USER32.128)
 */
HDWP WINAPI DeferWindowPos( HDWP hdwp, HWND hwnd, HWND hwndAfter,
                                INT x, INT y, INT cx, INT cy,
                                UINT flags )
{
    DWP *pDWP;
    int i;
    HDWP newhdwp = hdwp,retvalue;
    /* HWND parent; */
    WND *pWnd;

    pDWP = (DWP *) USER_HEAP_LIN_ADDR( hdwp );
    if (!pDWP) return 0;
    if (hwnd == GetDesktopWindow()) return 0;

    if (!(pWnd=WIN_FindWndPtr( hwnd ))) {
        USER_HEAP_FREE( hdwp );
        return 0;
    }
    	
/* Numega Bounds Checker Demo dislikes the following code.
   In fact, I've not been able to find any "same parent" requirement in any docu
   [AM 980509]
 */
#if 0
    /* All the windows of a DeferWindowPos() must have the same parent */
    parent = pWnd->parent->hwndSelf;
    if (pDWP->actualCount == 0) pDWP->hwndParent = parent;
    else if (parent != pDWP->hwndParent)
    {
        USER_HEAP_FREE( hdwp );
        retvalue = 0;
        goto END;
    }
#endif

    for (i = 0; i < pDWP->actualCount; i++)
    {
        if (pDWP->winPos[i].hwnd == hwnd)
        {
              /* Merge with the other changes */
            if (!(flags & SWP_NOZORDER))
            {
                pDWP->winPos[i].hwndInsertAfter = hwndAfter;
            }
            if (!(flags & SWP_NOMOVE))
            {
                pDWP->winPos[i].x = x;
                pDWP->winPos[i].y = y;
            }                
            if (!(flags & SWP_NOSIZE))
            {
                pDWP->winPos[i].cx = cx;
                pDWP->winPos[i].cy = cy;
            }
            pDWP->winPos[i].flags &= flags | ~(SWP_NOSIZE | SWP_NOMOVE |
                                               SWP_NOZORDER | SWP_NOREDRAW |
                                               SWP_NOACTIVATE | SWP_NOCOPYBITS|
                                               SWP_NOOWNERZORDER);
            pDWP->winPos[i].flags |= flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW |
                                              SWP_FRAMECHANGED);
            retvalue = hdwp;
            goto END;
        }
    }
    if (pDWP->actualCount >= pDWP->suggestedCount)
    {
        newhdwp = USER_HEAP_REALLOC( hdwp,
                      sizeof(DWP) + pDWP->suggestedCount*sizeof(WINDOWPOS) );
        if (!newhdwp)
        {
            retvalue = 0;
            goto END;
        }
        pDWP = (DWP *) USER_HEAP_LIN_ADDR( newhdwp );
        pDWP->suggestedCount++;
    }
    pDWP->winPos[pDWP->actualCount].hwnd = hwnd;
    pDWP->winPos[pDWP->actualCount].hwndInsertAfter = hwndAfter;
    pDWP->winPos[pDWP->actualCount].x = x;
    pDWP->winPos[pDWP->actualCount].y = y;
    pDWP->winPos[pDWP->actualCount].cx = cx;
    pDWP->winPos[pDWP->actualCount].cy = cy;
    pDWP->winPos[pDWP->actualCount].flags = flags;
    pDWP->actualCount++;
    retvalue = newhdwp;
END:
    WIN_ReleaseWndPtr(pWnd);
    return retvalue;
}


/***********************************************************************
 *           EndDeferWindowPos16   (USER.261)
 */
BOOL16 WINAPI EndDeferWindowPos16( HDWP16 hdwp )
{
    return EndDeferWindowPos( hdwp );
}


/***********************************************************************
 *           EndDeferWindowPos   (USER32.173)
 */
BOOL WINAPI EndDeferWindowPos( HDWP hdwp )
{
    DWP *pDWP;
    WINDOWPOS *winpos;
    BOOL res = TRUE;
    int i;

    pDWP = (DWP *) USER_HEAP_LIN_ADDR( hdwp );
    if (!pDWP) return FALSE;
    for (i = 0, winpos = pDWP->winPos; i < pDWP->actualCount; i++, winpos++)
    {
        if (!(res = SetWindowPos( winpos->hwnd, winpos->hwndInsertAfter,
                                    winpos->x, winpos->y, winpos->cx,
                                    winpos->cy, winpos->flags ))) break;
    }
    USER_HEAP_FREE( hdwp );
    return res;
}


/***********************************************************************
 *           TileChildWindows   (USER.199)
 */
void WINAPI TileChildWindows16( HWND16 parent, WORD action )
{
    FIXME("(%04x, %d): stub\n", parent, action);
}

/***********************************************************************
 *           CascageChildWindows   (USER.198)
 */
void WINAPI CascadeChildWindows16( HWND16 parent, WORD action )
{
    FIXME("(%04x, %d): stub\n", parent, action);
}

/***********************************************************************
 *           SetProgmanWindow			[USER32.522]
 */
HRESULT WINAPI SetProgmanWindow ( HWND hwnd )
{
	hGlobalProgmanWindow = hwnd;
	return hGlobalProgmanWindow;
}

/***********************************************************************
 *           GetProgmanWindow			[USER32.289]
 */
HRESULT WINAPI GetProgmanWindow ( )
{
	return hGlobalProgmanWindow;
}

/***********************************************************************
 *           SetShellWindowEx			[USER32.531]
 * hwndProgman =  Progman[Program Manager]
 *                |-> SHELLDLL_DefView
 * hwndListView = |   |-> SysListView32
 *                |   |   |-> tooltips_class32
 *                |   |
 *                |   |-> SysHeader32
 *                |   
 *                |-> ProxyTarget
 */
HRESULT WINAPI SetShellWindowEx ( HWND hwndProgman, HWND hwndListView )
{
	FIXME("0x%08x 0x%08x stub\n",hwndProgman ,hwndListView );
	hGlobalShellWindow = hwndProgman;
	return hGlobalShellWindow;

}

/***********************************************************************
 *           SetTaskmanWindow			[USER32.537]
 * NOTES
 *   hwnd = MSTaskSwWClass 
 *          |-> SysTabControl32
 */
HRESULT WINAPI SetTaskmanWindow ( HWND hwnd )
{
	hGlobalTaskmanWindow = hwnd;
	return hGlobalTaskmanWindow;
}

/***********************************************************************
 *           GetTaskmanWindow			[USER32.304]
 */
HRESULT WINAPI GetTaskmanWindow ( )
{	
	return hGlobalTaskmanWindow;
}