/*
 * Undocumented functions from COMCTL32.DLL
 *
 * Copyright 1998 Eric Kohl
 *           1998 Juergen Schmied <j.schmied@metronet.de>
 *           2000 Eric Kohl for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * NOTES
 *     All of these functions are UNDOCUMENTED!! And I mean UNDOCUMENTED!!!!
 *     Do NOT rely on names or contents of undocumented structures and types!!!
 *     These functions are used by EXPLORER.EXE, IEXPLORE.EXE and
 *     COMCTL32.DLL (internally).
 *
 */
#include "config.h"
#include "wine/port.h"

#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>

#define COBJMACROS
#define NONAMELESSUNION
#define NONAMELESSSTRUCT

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "winreg.h"
#include "commctrl.h"
#include "objbase.h"
#include "winerror.h"

#include "wine/unicode.h"
#include "comctl32.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(commctrl);

struct _DSA
{
    INT  nItemCount;
    LPVOID pData;
    INT  nMaxCount;
    INT  nItemSize;
    INT  nGrow;
};

struct _DPA
{
    INT    nItemCount;
    LPVOID   *ptrs;
    HANDLE hHeap;
    INT    nGrow;
    INT    nMaxCount;
};

typedef struct _STREAMDATA
{
    DWORD dwSize;
    DWORD dwData2;
    DWORD dwItems;
} STREAMDATA, *PSTREAMDATA;

typedef struct _LOADDATA
{
    INT   nCount;
    PVOID ptr;
} LOADDATA, *LPLOADDATA;

typedef HRESULT (CALLBACK *DPALOADPROC)(LPLOADDATA,IStream*,LPARAM);

static const WCHAR strMRUList[] = { 'M','R','U','L','i','s','t',0 };

/**************************************************************************
 * DPA_LoadStream [COMCTL32.9]
 *
 * Loads a dynamic pointer array from a stream
 *
 * PARAMS
 *     phDpa    [O] pointer to a handle to a dynamic pointer array
 *     loadProc [I] pointer to a callback function
 *     pStream  [I] pointer to a stream
 *     lParam   [I] application specific value
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE 
 *
 * NOTES
 *     No more information available yet!
 */
HRESULT WINAPI DPA_LoadStream (HDPA *phDpa, DPALOADPROC loadProc,
                               IStream *pStream, LPARAM lParam)
{
    HRESULT errCode;
    LARGE_INTEGER position;
    ULARGE_INTEGER newPosition;
    STREAMDATA  streamData;
    LOADDATA loadData;
    ULONG ulRead;
    HDPA hDpa;
    PVOID *ptr;

    FIXME ("phDpa=%p loadProc=%p pStream=%p lParam=%lx\n",
	   phDpa, loadProc, pStream, lParam);

    if (!phDpa || !loadProc || !pStream)
	return E_INVALIDARG;

    *phDpa = (HDPA)NULL;

    position.QuadPart = 0;

    /*
     * Zero out our streamData
     */
    memset(&streamData,0,sizeof(STREAMDATA));

    errCode = IStream_Seek (pStream, position, STREAM_SEEK_CUR, &newPosition);
    if (errCode != S_OK)
	return errCode;

    errCode = IStream_Read (pStream, &streamData, sizeof(STREAMDATA), &ulRead);
    if (errCode != S_OK)
	return errCode;

    FIXME ("dwSize=%lu dwData2=%lu dwItems=%lu\n",
	   streamData.dwSize, streamData.dwData2, streamData.dwItems);

    if ( ulRead < sizeof(STREAMDATA) ||
    lParam < sizeof(STREAMDATA) ||
	streamData.dwSize < sizeof(STREAMDATA) ||
	streamData.dwData2 < 1) {
	errCode = E_FAIL;
    }

    if (streamData.dwItems > (UINT_MAX / 2 / sizeof(VOID*))) /* 536870911 */
        return E_OUTOFMEMORY;

    /* create the dpa */
    hDpa = DPA_Create (streamData.dwItems);
    if (!hDpa)
	return E_OUTOFMEMORY;

    if (!DPA_Grow (hDpa, streamData.dwItems))
	return E_OUTOFMEMORY;

    /* load data from the stream into the dpa */
    ptr = hDpa->ptrs;
    for (loadData.nCount = 0; loadData.nCount < streamData.dwItems; loadData.nCount++) {
        errCode = (loadProc)(&loadData, pStream, lParam);
	if (errCode != S_OK) {
	    errCode = S_FALSE;
	    break;
	}

	*ptr = loadData.ptr;
	ptr++;
    }

    /* set the number of items */
    hDpa->nItemCount = loadData.nCount;

    /* store the handle to the dpa */
    *phDpa = hDpa;
    FIXME ("new hDpa=%p, errorcode=%lx\n", hDpa, errCode);

    return errCode;
}


/**************************************************************************
 * DPA_SaveStream [COMCTL32.10]
 *
 * Saves a dynamic pointer array to a stream
 *
 * PARAMS
 *     hDpa     [I] handle to a dynamic pointer array
 *     loadProc [I] pointer to a callback function
 *     pStream  [I] pointer to a stream
 *     lParam   [I] application specific value
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE 
 *
 * NOTES
 *     No more information available yet!
 */
HRESULT WINAPI DPA_SaveStream (const HDPA hDpa, DPALOADPROC loadProc,
                               IStream *pStream, LPARAM lParam)
{

    FIXME ("hDpa=%p loadProc=%p pStream=%p lParam=%lx\n",
	   hDpa, loadProc, pStream, lParam);

    return E_FAIL;
}


/**************************************************************************
 * DPA_Merge [COMCTL32.11]
 *
 * Merge two dynamic pointers arrays.
 *
 * PARAMS
 *     hdpa1       [I] handle to a dynamic pointer array
 *     hdpa2       [I] handle to a dynamic pointer array
 *     dwFlags     [I] flags
 *     pfnCompare  [I] pointer to sort function
 *     pfnMerge    [I] pointer to merge function
 *     lParam      [I] application specific value
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE 
 *
 * NOTES
 *     No more information available yet!
 */
BOOL WINAPI DPA_Merge (const HDPA hdpa1, const HDPA hdpa2, DWORD dwFlags,
                       PFNDPACOMPARE pfnCompare, PFNDPAMERGE pfnMerge,
                       LPARAM lParam)
{
    INT nCount;
    LPVOID *pWork1, *pWork2;
    INT nResult, i;
    INT nIndex;

    TRACE("%p %p %08lx %p %p %08lx)\n",
	   hdpa1, hdpa2, dwFlags, pfnCompare, pfnMerge, lParam);

    if (IsBadWritePtr (hdpa1, sizeof(*hdpa1)))
	return FALSE;

    if (IsBadWritePtr (hdpa2, sizeof(*hdpa2)))
	return FALSE;

    if (IsBadCodePtr ((FARPROC)pfnCompare))
	return FALSE;

    if (IsBadCodePtr ((FARPROC)pfnMerge))
	return FALSE;

    if (!(dwFlags & DPAM_NOSORT)) {
	TRACE("sorting dpa's!\n");
	if (hdpa1->nItemCount > 0)
	DPA_Sort (hdpa1, pfnCompare, lParam);
	TRACE ("dpa 1 sorted!\n");
	if (hdpa2->nItemCount > 0)
	DPA_Sort (hdpa2, pfnCompare, lParam);
	TRACE ("dpa 2 sorted!\n");
    }

    if (hdpa2->nItemCount < 1)
	return TRUE;

    TRACE("hdpa1->nItemCount=%d hdpa2->nItemCount=%d\n",
	   hdpa1->nItemCount, hdpa2->nItemCount);


    /* working but untrusted implementation */

    pWork1 = &(hdpa1->ptrs[hdpa1->nItemCount - 1]);
    pWork2 = &(hdpa2->ptrs[hdpa2->nItemCount - 1]);

    nIndex = hdpa1->nItemCount - 1;
    nCount = hdpa2->nItemCount - 1;

    do
    {
        if (nIndex < 0) {
	    if ((nCount >= 0) && (dwFlags & DPAM_INSERT)) {
		/* Now insert the remaining new items into DPA 1 */
		TRACE("%d items to be inserted at start of DPA 1\n",
		      nCount+1);
		for (i=nCount; i>=0; i--) {
		    PVOID ptr;

		    ptr = (pfnMerge)(3, *pWork2, NULL, lParam);
		    if (!ptr)
			return FALSE;
		    DPA_InsertPtr (hdpa1, 0, ptr);
		    pWork2--;
		}
	    }
	    break;
	}
	nResult = (pfnCompare)(*pWork1, *pWork2, lParam);
	TRACE("compare result=%d, dpa1.cnt=%d, dpa2.cnt=%d\n",
	      nResult, nIndex, nCount);

	if (nResult == 0)
	{
	    PVOID ptr;

	    ptr = (pfnMerge)(1, *pWork1, *pWork2, lParam);
	    if (!ptr)
		return FALSE;

	    nCount--;
	    pWork2--;
	    *pWork1 = ptr;
	    nIndex--;
	    pWork1--;
	}
	else if (nResult > 0)
	{
	    /* item in DPA 1 missing from DPA 2 */
	    if (dwFlags & DPAM_DELETE)
	    {
		/* Now delete the extra item in DPA1 */
		PVOID ptr;

		ptr = DPA_DeletePtr (hdpa1, hdpa1->nItemCount - 1);

		(pfnMerge)(2, ptr, NULL, lParam);
	    }
	    nIndex--;
	    pWork1--;
	}
	else
	{
	    /* new item in DPA 2 */
	    if (dwFlags & DPAM_INSERT)
	    {
		/* Now insert the new item in DPA 1 */
		PVOID ptr;

		ptr = (pfnMerge)(3, *pWork2, NULL, lParam);
		if (!ptr)
		    return FALSE;
		DPA_InsertPtr (hdpa1, nIndex+1, ptr);
	    }
	    nCount--;
	    pWork2--;
	}

    }
    while (nCount >= 0);

    return TRUE;
}


/**************************************************************************
 * Alloc [COMCTL32.71]
 *
 * Allocates memory block from the dll's private heap
 *
 * PARAMS
 *     dwSize [I] size of the allocated memory block
 *
 * RETURNS
 *     Success: pointer to allocated memory block
 *     Failure: NULL
 */
LPVOID WINAPI Alloc (DWORD dwSize)
{
    return LocalAlloc( LMEM_ZEROINIT, dwSize );
}


/**************************************************************************
 * ReAlloc [COMCTL32.72]
 *
 * Changes the size of an allocated memory block or allocates a memory
 * block using the dll's private heap.
 *
 * PARAMS
 *     lpSrc  [I] pointer to memory block which will be resized
 *     dwSize [I] new size of the memory block.
 *
 * RETURNS
 *     Success: pointer to the resized memory block
 *     Failure: NULL
 *
 * NOTES
 *     If lpSrc is a NULL-pointer, then ReAlloc allocates a memory
 *     block like Alloc.
 */
LPVOID WINAPI ReAlloc (LPVOID lpSrc, DWORD dwSize)
{
    if (lpSrc)
        return LocalReAlloc( lpSrc, dwSize, LMEM_ZEROINIT );
    else
        return LocalAlloc( LMEM_ZEROINIT, dwSize);
}


/**************************************************************************
 * Free [COMCTL32.73]
 *
 * Frees an allocated memory block from the dll's private heap.
 *
 * PARAMS
 *     lpMem [I] pointer to memory block which will be freed
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI Free (LPVOID lpMem)
{
    return !LocalFree( lpMem );
}


/**************************************************************************
 * GetSize [COMCTL32.74]
 *
 * Retrieves the size of the specified memory block from the dll's
 * private heap.
 *
 * PARAMS
 *     lpMem [I] pointer to an allocated memory block
 *
 * RETURNS
 *     Success: size of the specified memory block
 *     Failure: 0
 */
DWORD WINAPI GetSize (LPVOID lpMem)
{
    return LocalSize( lpMem );
}


/**************************************************************************
 * MRU-Functions  {COMCTL32}
 *
 * NOTES
 * The MRU-Api is a set of functions to manipulate lists of M.R.U. (Most Recently
 * Used) items. It is an undocumented Api that is used (at least) by the shell
 * and explorer to implement their recent documents feature.
 *
 * Since these functions are undocumented, they are unsupported by MS and
 * may change at any time.
 *
 * Internally, the list is implemented as a last in, last out list of items
 * persisted into the system registry under a caller chosen key. Each list
 * item is given a one character identifier in the Ascii range from 'a' to
 * '}'. A list of the identifiers in order from newest to oldest is stored
 * under the same key in a value named "MRUList".
 *
 * Items are re-ordered by changing the order of the values in the MRUList
 * value. When a new item is added, it becomes the new value of the oldest
 * identifier, and that identifier is moved to the front of the MRUList value.
 * 
 * Wine stores MRU-lists in the same registry format as Windows, so when
 * switching between the builtin and native comctl32.dll no problems or
 * incompatibilities should occur.
 *
 * The following undocumented structure is used to create an MRU-list:
 *|typedef INT (CALLBACK *MRUStringCmpFn)(LPCTSTR lhs, LPCTSTR rhs);
 *|typedef INT (CALLBACK *MRUBinaryCmpFn)(LPCVOID lhs, LPCVOID rhs, DWORD length);
 *|
 *|typedef struct tagCREATEMRULIST
 *|{
 *|    DWORD   cbSize;
 *|    DWORD   nMaxItems;
 *|    DWORD   dwFlags;
 *|    HKEY    hKey;
 *|    LPCTSTR lpszSubKey;
 *|    PROC    lpfnCompare;
 *|} CREATEMRULIST, *LPCREATEMRULIST;
 *
 * MEMBERS
 *  cbSize      [I] The size of the CREATEMRULIST structure. This must be set
 *                  to sizeof(CREATEMRULIST) by the caller.
 *  nMaxItems   [I] The maximum number of items allowed in the list. Because
 *                  of the limited number of identifiers, this should be set to
 *                  a value from 1 to 30 by the caller.
 *  dwFlags     [I] If bit 0 is set, the list will be used to store binary
 *                  data, otherwise it is assumed to store strings. If bit 1
 *                  is set, every change made to the list will be reflected in
 *                  the registry immediately, otherwise changes will only be
 *                  written when the list is closed.
 *  hKey        [I] The registry key that the list should be written under.
 *                  This must be supplied by the caller.
 *  lpszSubKey  [I] A caller supplied name of a subkey under hKey to write
 *                  the list to. This may not be blank.
 *  lpfnCompare [I] A caller supplied comparison function, which may be either
 *                  an MRUStringCmpFn if dwFlags does not have bit 0 set, or a
 *                  MRUBinaryCmpFn otherwise.
 *
 * FUNCTIONS
 *  - Create an MRU-list with CreateMRUList() or CreateMRUListLazy().
 *  - Add items to an MRU-list with AddMRUString() or AddMRUData().
 *  - Remove items from an MRU-list with DelMRUString().
 *  - Find data in an MRU-list with FindMRUString() or FindMRUData().
 *  - Iterate through an MRU-list with EnumMRUList().
 *  - Free an MRU-list with FreeMRUList().
 */

typedef struct tagCREATEMRULISTA
{
    DWORD  cbSize;
    DWORD  nMaxItems;
    DWORD  dwFlags;
    HKEY   hKey;
    LPCSTR lpszSubKey;
    PROC   lpfnCompare;
} CREATEMRULISTA, *LPCREATEMRULISTA;

typedef struct tagCREATEMRULISTW
{
    DWORD   cbSize;
    DWORD   nMaxItems;
    DWORD   dwFlags;
    HKEY    hKey;
    LPCWSTR lpszSubKey;
    PROC    lpfnCompare;
} CREATEMRULISTW, *LPCREATEMRULISTW;

/* dwFlags */
#define MRUF_STRING_LIST  0 /* list will contain strings */
#define MRUF_BINARY_LIST  1 /* list will contain binary data */
#define MRUF_DELAYED_SAVE 2 /* only save list order to reg. is FreeMRUList */

/* If list is a string list lpfnCompare has the following prototype
 * int CALLBACK MRUCompareString(LPCSTR s1, LPCSTR s2)
 * for binary lists the prototype is
 * int CALLBACK MRUCompareBinary(LPCVOID data1, LPCVOID data2, DWORD cbData)
 * where cbData is the no. of bytes to compare.
 * Need to check what return value means identical - 0?
 */

typedef struct tagWINEMRUITEM
{
    DWORD          size;        /* size of data stored               */
    DWORD          itemFlag;    /* flags                             */
    BYTE           datastart;
} WINEMRUITEM, *LPWINEMRUITEM;

/* itemFlag */
#define WMRUIF_CHANGED   0x0001 /* this dataitem changed             */

typedef struct tagWINEMRULIST
{
    CREATEMRULISTW extview;     /* original create information       */
    BOOL           isUnicode;   /* is compare fn Unicode */
    DWORD          wineFlags;   /* internal flags                    */
    DWORD          cursize;     /* current size of realMRU           */
    LPWSTR         realMRU;     /* pointer to string of index names  */
    LPWINEMRUITEM  *array;      /* array of pointers to data         */
                                /* in 'a' to 'z' order               */
} WINEMRULIST, *LPWINEMRULIST;

/* wineFlags */
#define WMRUF_CHANGED  0x0001   /* MRU list has changed              */

/**************************************************************************
 *              MRU_SaveChanged (internal)
 *
 * Local MRU saving code
 */
static void MRU_SaveChanged ( LPWINEMRULIST mp )
{
    UINT i, err;
    HKEY newkey;
    WCHAR realname[2];
    LPWINEMRUITEM witem;
    static const WCHAR emptyW[] = {'\0'};

    /* or should we do the following instead of RegOpenKeyEx:
     */

    /* open the sub key */
    if ((err = RegOpenKeyExW( mp->extview.hKey, mp->extview.lpszSubKey,
			      0, KEY_WRITE, &newkey))) {
	/* not present - what to do ??? */
	ERR("Could not open key, error=%d, attempting to create\n",
	    err);
	if ((err = RegCreateKeyExW( mp->extview.hKey, mp->extview.lpszSubKey,
				    0,
				    emptyW,
				    REG_OPTION_NON_VOLATILE,
				    KEY_READ | KEY_WRITE,
				    0,
				    &newkey,
				    0))) {
	    ERR("failed to create key /%s/, err=%d\n",
		debugstr_w(mp->extview.lpszSubKey), err);
	    return;
	}
    }
    if (mp->wineFlags & WMRUF_CHANGED) {
	mp->wineFlags &= ~WMRUF_CHANGED;
	err = RegSetValueExW(newkey, strMRUList, 0, REG_SZ, (LPBYTE)mp->realMRU,
			     (strlenW(mp->realMRU) + 1)*sizeof(WCHAR));
	if (err) {
	    ERR("error saving MRUList, err=%d\n", err);
	}
	TRACE("saving MRUList=/%s/\n", debugstr_w(mp->realMRU));
    }
    realname[1] = 0;
    for(i=0; i<mp->cursize; i++) {
	witem = mp->array[i];
	if (witem->itemFlag & WMRUIF_CHANGED) {
	    witem->itemFlag &= ~WMRUIF_CHANGED;
	    realname[0] = 'a' + i;
	    err = RegSetValueExW(newkey, realname, 0,
				 (mp->extview.dwFlags & MRUF_BINARY_LIST) ?
				 REG_BINARY : REG_SZ,
				 &witem->datastart, witem->size);
	    if (err) {
		ERR("error saving /%s/, err=%d\n", debugstr_w(realname), err);
	    }
	    TRACE("saving value for name /%s/ size=%ld\n",
		  debugstr_w(realname), witem->size);
	}
    }
    RegCloseKey( newkey );
}

/**************************************************************************
 *              FreeMRUList [COMCTL32.152]
 *
 * Frees a most-recently-used items list.
 *
 * PARAMS
 *     hMRUList [I] Handle to list.
 *
 * RETURNS
 *     Nothing.
 */
void WINAPI FreeMRUList (HANDLE hMRUList)
{
    LPWINEMRULIST mp = (LPWINEMRULIST)hMRUList;
    UINT i;

    TRACE("(%p)\n", hMRUList);
    if (!hMRUList)
        return;

    if (mp->wineFlags & WMRUF_CHANGED) {
	/* need to open key and then save the info */
	MRU_SaveChanged( mp );
    }

    for(i=0; i<mp->extview.nMaxItems; i++) {
	if (mp->array[i])
	    Free(mp->array[i]);
    }
    Free(mp->realMRU);
    Free(mp->array);
    Free((LPWSTR)mp->extview.lpszSubKey);
    Free(mp);
}


/**************************************************************************
 *                  FindMRUData [COMCTL32.169]
 *
 * Searches binary list for item that matches lpData of length cbData.
 * Returns position in list order 0 -> MRU and if lpRegNum != NULL then value
 * corresponding to item's reg. name will be stored in it ('a' -> 0).
 *
 * PARAMS
 *    hList [I] list handle
 *    lpData [I] data to find
 *    cbData [I] length of data
 *    lpRegNum [O] position in registry (maybe NULL)
 *
 * RETURNS
 *    Position in list 0 -> MRU.  -1 if item not found.
 */
INT WINAPI FindMRUData (HANDLE hList, LPCVOID lpData, DWORD cbData,
                        LPINT lpRegNum)
{
    LPWINEMRULIST mp = (LPWINEMRULIST)hList;
    INT ret;
    UINT i;
    LPSTR dataA = NULL;

    if (!mp->extview.lpfnCompare) {
	ERR("MRU list not properly created. No compare procedure.\n");
	return -1;
    }

    if(!(mp->extview.dwFlags & MRUF_BINARY_LIST) && !mp->isUnicode) {
        DWORD len = WideCharToMultiByte(CP_ACP, 0, lpData, -1,
					NULL, 0, NULL, NULL);
	dataA = Alloc(len);
	WideCharToMultiByte(CP_ACP, 0, lpData, -1, dataA, len, NULL, NULL);
    }

    for(i=0; i<mp->cursize; i++) {
	if (mp->extview.dwFlags & MRUF_BINARY_LIST) {
	    if (!mp->extview.lpfnCompare(lpData, &mp->array[i]->datastart,
					 cbData))
		break;
	}
	else {
	    if(mp->isUnicode) {
	        if (!mp->extview.lpfnCompare(lpData, &mp->array[i]->datastart))
		    break;
	    } else {
	        DWORD len = WideCharToMultiByte(CP_ACP, 0,
						(LPWSTR)&mp->array[i]->datastart, -1,
						NULL, 0, NULL, NULL);
		LPSTR itemA = Alloc(len);
		INT cmp;
		WideCharToMultiByte(CP_ACP, 0, (LPWSTR)&mp->array[i]->datastart, -1,
				    itemA, len, NULL, NULL);

	        cmp = mp->extview.lpfnCompare(dataA, itemA);
		Free(itemA);
		if(!cmp)
		    break;
	    }
	}
    }
    if(dataA)
        Free(dataA);
    if (i < mp->cursize)
	ret = i;
    else
	ret = -1;
    if (lpRegNum && (ret != -1))
	*lpRegNum = 'a' + i;

    TRACE("(%p, %p, %ld, %p) returning %d\n",
	   hList, lpData, cbData, lpRegNum, ret);

    return ret;
}


/**************************************************************************
 *              AddMRUData [COMCTL32.167]
 *
 * Add item to MRU binary list.  If item already exists in list then it is
 * simply moved up to the top of the list and not added again.  If list is
 * full then the least recently used item is removed to make room.
 *
 * PARAMS
 *     hList [I] Handle to list.
 *     lpData [I] ptr to data to add.
 *     cbData [I] no. of bytes of data.
 *
 * RETURNS
 *     No. corresponding to registry name where value is stored 'a' -> 0 etc.
 *     -1 on error.
 */
INT WINAPI AddMRUData (HANDLE hList, LPCVOID lpData, DWORD cbData)
{
    LPWINEMRULIST mp = (LPWINEMRULIST)hList;
    LPWINEMRUITEM witem;
    INT i, replace;

    if ((replace = FindMRUData (hList, lpData, cbData, NULL)) >= 0) {
        /* Item exists, just move it to the front */
        LPWSTR pos = strchrW(mp->realMRU, replace + 'a');
        while (pos > mp->realMRU)
        {
            pos[0] = pos[-1];
            pos--;
        }
    }
    else {
	/* either add a new entry or replace oldest */
	if (mp->cursize < mp->extview.nMaxItems) {
	    /* Add in a new item */
	    replace = mp->cursize;
	    mp->cursize++;
	}
	else {
	    /* get the oldest entry and replace data */
	    replace = mp->realMRU[mp->cursize - 1] - 'a';
	    Free(mp->array[replace]);
	}

        /* Allocate space for new item and move in the data */
        mp->array[replace] = witem = Alloc(cbData + sizeof(WINEMRUITEM));
        witem->itemFlag |= WMRUIF_CHANGED;
        witem->size = cbData;
        memcpy( &witem->datastart, lpData, cbData);

        /* now rotate MRU list */
        for(i=mp->cursize-1; i>=1; i--)
            mp->realMRU[i] = mp->realMRU[i-1];
    }

    /* The new item gets the front spot */
    mp->wineFlags |= WMRUF_CHANGED;
    mp->realMRU[0] = replace + 'a';

    TRACE("(%p, %p, %ld) adding data, /%c/ now most current\n",
          hList, lpData, cbData, replace+'a');

    if (!(mp->extview.dwFlags & MRUF_DELAYED_SAVE)) {
	/* save changed stuff right now */
	MRU_SaveChanged( mp );
    }

    return replace;
}

/**************************************************************************
 *              AddMRUStringW [COMCTL32.401]
 *
 * Add an item to an MRU string list.
 *
 * PARAMS
 *     hList      [I] Handle to list.
 *     lpszString [I] The string to add.
 *
 * RETURNS
 *   Success: The number corresponding to the registry name where the string
 *            has been stored (0 maps to 'a', 1 to 'b' and so on).
 *   Failure: -1, if hList is NULL or memory allocation fails. If lpszString
 *            is invalid, the function returns 0, and GetLastError() returns
 *            ERROR_INVALID_PARAMETER. The last error value is set only in
 *            this case.
 *
 * NOTES
 *  -If lpszString exists in the list already, it is moved to the top of the
 *   MRU list (it is not duplicated).
 *  -If the list is full the least recently used list entry is replaced with
 *   lpszString.
 *  -If this function returns 0 you should check the last error value to
 *   ensure the call really succeeded.
 */
INT WINAPI AddMRUStringW(HANDLE hList, LPCWSTR lpszString)
{
    TRACE("(%p,%s)\n", hList, debugstr_w(lpszString));

    if (!hList)
        return -1;

    if (!lpszString || IsBadStringPtrW(lpszString, -1))
    {
        SetLastError(ERROR_INVALID_PARAMETER);
        return 0;
    }

    return AddMRUData(hList, lpszString,
                      (strlenW(lpszString) + 1) * sizeof(WCHAR));
}

/**************************************************************************
 *              AddMRUStringA [COMCTL32.153]
 *
 * See AddMRUStringW.
 */
INT WINAPI AddMRUStringA(HANDLE hList, LPCSTR lpszString)
{
    DWORD len;
    LPWSTR stringW;
    INT ret;

    TRACE("(%p,%s)\n", hList, debugstr_a(lpszString));

    if (!hList)
        return -1;

    if (IsBadStringPtrA(lpszString, -1))
    {
        SetLastError(ERROR_INVALID_PARAMETER);
	return 0;
    }

    len = MultiByteToWideChar(CP_ACP, 0, lpszString, -1, NULL, 0) * sizeof(WCHAR);
    stringW = Alloc(len);
    if (!stringW)
        return -1;

    MultiByteToWideChar(CP_ACP, 0, lpszString, -1, stringW, len);
    ret = AddMRUData(hList, stringW, len);
    Free(stringW);
    return ret;
}

/**************************************************************************
 *              DelMRUString [COMCTL32.156]
 *
 * Removes item from either string or binary list (despite its name)
 *
 * PARAMS
 *    hList [I] list handle
 *    nItemPos [I] item position to remove 0 -> MRU
 *
 * RETURNS
 *    TRUE if successful, FALSE if nItemPos is out of range.
 */
BOOL WINAPI DelMRUString(HANDLE hList, INT nItemPos)
{
    FIXME("(%p, %d): stub\n", hList, nItemPos);
    return TRUE;
}

/**************************************************************************
 *                  FindMRUStringW [COMCTL32.402]
 *
 * See FindMRUStringA.
 */
INT WINAPI FindMRUStringW (HANDLE hList, LPCWSTR lpszString, LPINT lpRegNum)
{
  return FindMRUData(hList, lpszString,
                     (lstrlenW(lpszString) + 1) * sizeof(WCHAR), lpRegNum);
}

/**************************************************************************
 *                  FindMRUStringA [COMCTL32.155]
 *
 * Searches string list for item that matches lpszString.
 * Returns position in list order 0 -> MRU and if lpRegNum != NULL then value
 * corresponding to item's reg. name will be stored in it ('a' -> 0).
 *
 * PARAMS
 *    hList [I] list handle
 *    lpszString [I] string to find
 *    lpRegNum [O] position in registry (maybe NULL)
 *
 * RETURNS
 *    Position in list 0 -> MRU.  -1 if item not found.
 */
INT WINAPI FindMRUStringA (HANDLE hList, LPCSTR lpszString, LPINT lpRegNum)
{
    DWORD len = MultiByteToWideChar(CP_ACP, 0, lpszString, -1, NULL, 0);
    LPWSTR stringW = Alloc(len * sizeof(WCHAR));
    INT ret;

    MultiByteToWideChar(CP_ACP, 0, lpszString, -1, stringW, len);
    ret = FindMRUData(hList, stringW, len * sizeof(WCHAR), lpRegNum);
    Free(stringW);
    return ret;
}

/*************************************************************************
 *                 CreateMRUListLazy_common (internal)
 */
static HANDLE CreateMRUListLazy_common(LPWINEMRULIST mp)
{
    UINT i, err;
    HKEY newkey;
    DWORD datasize, dwdisp;
    WCHAR realname[2];
    LPWINEMRUITEM witem;
    DWORD type;
    static const WCHAR emptyW[] = {'\0'};

    /* get space to save indices that will turn into names
     * but in order of most to least recently used
     */
    mp->realMRU = Alloc((mp->extview.nMaxItems + 2) * sizeof(WCHAR));

    /* get space to save pointers to actual data in order of
     * 'a' to 'z' (0 to n).
     */
    mp->array = Alloc(mp->extview.nMaxItems * sizeof(LPVOID));

    /* open the sub key */
    if ((err = RegCreateKeyExW( mp->extview.hKey, mp->extview.lpszSubKey,
			        0,
				emptyW,
				REG_OPTION_NON_VOLATILE,
				KEY_READ | KEY_WRITE,
                                0,
				&newkey,
				&dwdisp))) {
	/* error - what to do ??? */
	ERR("(%lu %lu %lx %lx \"%s\" %p): Could not open key, error=%d\n",
	    mp->extview.cbSize, mp->extview.nMaxItems, mp->extview.dwFlags,
	    (DWORD)mp->extview.hKey, debugstr_w(mp->extview.lpszSubKey),
				 mp->extview.lpfnCompare, err);
	return 0;
    }

    /* get values from key 'MRUList' */
    if (newkey) {
	datasize = mp->extview.nMaxItems + 1;
	if((err=RegQueryValueExW( newkey, strMRUList, 0, &type,
				  (LPBYTE)mp->realMRU, &datasize))) {
	    /* not present - set size to 1 (will become 0 later) */
	    datasize = 1;
	    *mp->realMRU = 0;
	}

	TRACE("MRU list = %s, datasize = %ld\n", debugstr_w(mp->realMRU), datasize);

	mp->cursize = datasize - 1;
	/* datasize now has number of items in the MRUList */

	/* get actual values for each entry */
	realname[1] = 0;
	for(i=0; i<mp->cursize; i++) {
	    realname[0] = 'a' + i;
	    if(RegQueryValueExW( newkey, realname, 0, &type, 0, &datasize)) {
		/* not present - what to do ??? */
		ERR("Key %s not found 1\n", debugstr_w(realname));
	    }
	    mp->array[i] = witem = Alloc(datasize + sizeof(WINEMRUITEM));
	    witem->size = datasize;
	    if(RegQueryValueExW( newkey, realname, 0, &type,
				 &witem->datastart, &datasize)) {
		/* not present - what to do ??? */
		ERR("Key %s not found 2\n", debugstr_w(realname));
	    }
	}
	RegCloseKey( newkey );
    }
    else
	mp->cursize = 0;

    TRACE("(%lu %lu %lx %lx \"%s\" %p): Current Size = %ld\n",
	  mp->extview.cbSize, mp->extview.nMaxItems, mp->extview.dwFlags,
	  (DWORD)mp->extview.hKey, debugstr_w(mp->extview.lpszSubKey),
	  mp->extview.lpfnCompare, mp->cursize);
    return (HANDLE)mp;
}

/**************************************************************************
 *                  CreateMRUListLazyW [COMCTL32.404]
 *
 * See CreateMRUListLazyA.
 */
HANDLE WINAPI CreateMRUListLazyW (LPCREATEMRULISTW lpcml, DWORD dwParam2,
                                  DWORD dwParam3, DWORD dwParam4)
{
    LPWINEMRULIST mp;

    /* Native does not check for a NULL lpcml */

    if (lpcml->cbSize != sizeof(CREATEMRULISTW) || !lpcml->hKey ||
        IsBadStringPtrW(lpcml->lpszSubKey, -1))
	return NULL;

    mp = Alloc(sizeof(WINEMRULIST));
    memcpy(&mp->extview, lpcml, sizeof(CREATEMRULISTW));
    mp->extview.lpszSubKey = Alloc((strlenW(lpcml->lpszSubKey) + 1) * sizeof(WCHAR));
    strcpyW((LPWSTR)mp->extview.lpszSubKey, lpcml->lpszSubKey);
    mp->isUnicode = TRUE;

    return CreateMRUListLazy_common(mp);
}

/**************************************************************************
 *                  CreateMRUListLazyA [COMCTL32.157]
 *
 * Creates a most-recently-used list.
 *
 * PARAMS
 *     lpcml    [I] ptr to CREATEMRULIST structure.
 *     dwParam2 [I] Unknown
 *     dwParam3 [I] Unknown
 *     dwParam4 [I] Unknown
 *
 * RETURNS
 *     Handle to MRU list.
 */
HANDLE WINAPI CreateMRUListLazyA (LPCREATEMRULISTA lpcml, DWORD dwParam2,
                                  DWORD dwParam3, DWORD dwParam4)
{
    LPWINEMRULIST mp;
    DWORD len;

    /* Native does not check for a NULL lpcml */

    if (lpcml->cbSize != sizeof(CREATEMRULISTA) || !lpcml->hKey ||
        IsBadStringPtrA(lpcml->lpszSubKey, -1))
	return 0;

    mp = Alloc(sizeof(WINEMRULIST));
    memcpy(&mp->extview, lpcml, sizeof(CREATEMRULISTW));
    len = MultiByteToWideChar(CP_ACP, 0, lpcml->lpszSubKey, -1, NULL, 0);
    mp->extview.lpszSubKey = Alloc(len * sizeof(WCHAR));
    MultiByteToWideChar(CP_ACP, 0, lpcml->lpszSubKey, -1,
			(LPWSTR)mp->extview.lpszSubKey, len);
    mp->isUnicode = FALSE;
    return CreateMRUListLazy_common(mp);
}

/**************************************************************************
 *              CreateMRUListW [COMCTL32.400]
 *
 * See CreateMRUListA.
 */
HANDLE WINAPI CreateMRUListW (LPCREATEMRULISTW lpcml)
{
    return CreateMRUListLazyW(lpcml, 0, 0, 0);
}

/**************************************************************************
 *              CreateMRUListA [COMCTL32.151]
 *
 * Creates a most-recently-used list.
 *
 * PARAMS
 *     lpcml [I] ptr to CREATEMRULIST structure.
 *
 * RETURNS
 *     Handle to MRU list.
 */
HANDLE WINAPI CreateMRUListA (LPCREATEMRULISTA lpcml)
{
     return CreateMRUListLazyA (lpcml, 0, 0, 0);
}


/**************************************************************************
 *                EnumMRUListW [COMCTL32.403]
 *
 * Enumerate item in a most-recenty-used list
 *
 * PARAMS
 *    hList [I] list handle
 *    nItemPos [I] item position to enumerate
 *    lpBuffer [O] buffer to receive item
 *    nBufferSize [I] size of buffer
 *
 * RETURNS
 *    For binary lists specifies how many bytes were copied to buffer, for
 *    string lists specifies full length of string.  Enumerating past the end
 *    of list returns -1.
 *    If lpBuffer == NULL or nItemPos is -ve return value is no. of items in
 *    the list.
 */
INT WINAPI EnumMRUListW (HANDLE hList, INT nItemPos, LPVOID lpBuffer,
                         DWORD nBufferSize)
{
    LPWINEMRULIST mp = (LPWINEMRULIST) hList;
    LPWINEMRUITEM witem;
    INT desired, datasize;

    if (nItemPos >= mp->cursize) return -1;
    if ((nItemPos < 0) || !lpBuffer) return mp->cursize;
    desired = mp->realMRU[nItemPos];
    desired -= 'a';
    TRACE("nItemPos=%d, desired=%d\n", nItemPos, desired);
    witem = mp->array[desired];
    datasize = min( witem->size, nBufferSize );
    memcpy( lpBuffer, &witem->datastart, datasize);
    TRACE("(%p, %d, %p, %ld): returning len=%d\n",
	  hList, nItemPos, lpBuffer, nBufferSize, datasize);
    return datasize;
}

/**************************************************************************
 *                EnumMRUListA [COMCTL32.154]
 *
 * See EnumMRUListW.
 */
INT WINAPI EnumMRUListA (HANDLE hList, INT nItemPos, LPVOID lpBuffer,
                         DWORD nBufferSize)
{
    LPWINEMRULIST mp = (LPWINEMRULIST) hList;
    LPWINEMRUITEM witem;
    INT desired, datasize;
    DWORD lenA;

    if (nItemPos >= mp->cursize) return -1;
    if ((nItemPos < 0) || !lpBuffer) return mp->cursize;
    desired = mp->realMRU[nItemPos];
    desired -= 'a';
    TRACE("nItemPos=%d, desired=%d\n", nItemPos, desired);
    witem = mp->array[desired];
    if(mp->extview.dwFlags & MRUF_BINARY_LIST) {
        datasize = min( witem->size, nBufferSize );
	memcpy( lpBuffer, &witem->datastart, datasize);
    } else {
        lenA = WideCharToMultiByte(CP_ACP, 0, (LPWSTR)&witem->datastart, -1,
				   NULL, 0, NULL, NULL);
	datasize = min( witem->size, nBufferSize );
	WideCharToMultiByte(CP_ACP, 0, (LPWSTR)&witem->datastart, -1,
			    lpBuffer, datasize, NULL, NULL);
    }
    TRACE("(%p, %d, %p, %ld): returning len=%d\n",
	  hList, nItemPos, lpBuffer, nBufferSize, datasize);
    return datasize;
}


/**************************************************************************
 * Str_GetPtrA [COMCTL32.233]
 *
 * Copies a string into a destination buffer.
 *
 * PARAMS
 *     lpSrc   [I] Source string
 *     lpDest  [O] Destination buffer
 *     nMaxLen [I] Size of buffer in characters
 *
 * RETURNS
 *     The number of characters copied.
 */
INT WINAPI Str_GetPtrA (LPCSTR lpSrc, LPSTR lpDest, INT nMaxLen)
{
    INT len;

    TRACE("(%p %p %d)\n", lpSrc, lpDest, nMaxLen);

    if (!lpDest && lpSrc)
	return strlen (lpSrc);

    if (nMaxLen == 0)
	return 0;

    if (lpSrc == NULL) {
	lpDest[0] = '\0';
	return 0;
    }

    len = strlen (lpSrc);
    if (len >= nMaxLen)
	len = nMaxLen - 1;

    RtlMoveMemory (lpDest, lpSrc, len);
    lpDest[len] = '\0';

    return len;
}


/**************************************************************************
 * Str_SetPtrA [COMCTL32.234]
 *
 * Makes a copy of a string, allocating memory if necessary.
 *
 * PARAMS
 *     lppDest [O] Pointer to destination string
 *     lpSrc   [I] Source string
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 *
 * NOTES
 *     Set lpSrc to NULL to free the memory allocated by a previous call
 *     to this function.
 */
BOOL WINAPI Str_SetPtrA (LPSTR *lppDest, LPCSTR lpSrc)
{
    TRACE("(%p %p)\n", lppDest, lpSrc);

    if (lpSrc) {
	LPSTR ptr = ReAlloc (*lppDest, strlen (lpSrc) + 1);
	if (!ptr)
	    return FALSE;
	strcpy (ptr, lpSrc);
	*lppDest = ptr;
    }
    else {
	if (*lppDest) {
	    Free (*lppDest);
	    *lppDest = NULL;
	}
    }

    return TRUE;
}


/**************************************************************************
 * Str_GetPtrW [COMCTL32.235]
 *
 * See Str_GetPtrA.
 */
INT WINAPI Str_GetPtrW (LPCWSTR lpSrc, LPWSTR lpDest, INT nMaxLen)
{
    INT len;

    TRACE("(%p %p %d)\n", lpSrc, lpDest, nMaxLen);

    if (!lpDest && lpSrc)
	return strlenW (lpSrc);

    if (nMaxLen == 0)
	return 0;

    if (lpSrc == NULL) {
	lpDest[0] = L'\0';
	return 0;
    }

    len = strlenW (lpSrc);
    if (len >= nMaxLen)
	len = nMaxLen - 1;

    RtlMoveMemory (lpDest, lpSrc, len*sizeof(WCHAR));
    lpDest[len] = L'\0';

    return len;
}


/**************************************************************************
 * Str_SetPtrW [COMCTL32.236]
 *
 * See Str_SetPtrA.
 */
BOOL WINAPI Str_SetPtrW (LPWSTR *lppDest, LPCWSTR lpSrc)
{
    TRACE("(%p %p)\n", lppDest, lpSrc);

    if (lpSrc) {
	INT len = strlenW (lpSrc) + 1;
	LPWSTR ptr = ReAlloc (*lppDest, len * sizeof(WCHAR));
	if (!ptr)
	    return FALSE;
	strcpyW (ptr, lpSrc);
	*lppDest = ptr;
    }
    else {
	if (*lppDest) {
	    Free (*lppDest);
	    *lppDest = NULL;
	}
    }

    return TRUE;
}


/**************************************************************************
 * Str_GetPtrWtoA [internal]
 *
 * Converts a unicode string into a multi byte string
 *
 * PARAMS
 *     lpSrc   [I] Pointer to the unicode source string
 *     lpDest  [O] Pointer to caller supplied storage for the multi byte string
 *     nMaxLen [I] Size, in bytes, of the destination buffer
 *
 * RETURNS
 *     Length, in bytes, of the converted string.
 */

INT Str_GetPtrWtoA (LPCWSTR lpSrc, LPSTR lpDest, INT nMaxLen)
{
    INT len;

    TRACE("(%s %p %d)\n", debugstr_w(lpSrc), lpDest, nMaxLen);

    if (!lpDest && lpSrc)
	return WideCharToMultiByte(CP_ACP, 0, lpSrc, -1, 0, 0, NULL, NULL);

    if (nMaxLen == 0)
	return 0;

    if (lpSrc == NULL) {
	lpDest[0] = '\0';
	return 0;
    }

    len = WideCharToMultiByte(CP_ACP, 0, lpSrc, -1, 0, 0, NULL, NULL);
    if (len >= nMaxLen)
	len = nMaxLen - 1;

    WideCharToMultiByte(CP_ACP, 0, lpSrc, -1, lpDest, len, NULL, NULL);
    lpDest[len] = '\0';

    return len;
}


/**************************************************************************
 * Str_SetPtrAtoW [internal]
 *
 * Converts a multi byte string to a unicode string.
 * If the pointer to the destination buffer is NULL a buffer is allocated.
 * If the destination buffer is too small to keep the converted multi byte
 * string the destination buffer is reallocated. If the source pointer is
 * NULL, the destination buffer is freed.
 *
 * PARAMS
 *     lppDest [I/O] pointer to a pointer to the destination buffer
 *     lpSrc   [I] pointer to a multi byte string
 *
 * RETURNS
 *     TRUE: conversion successful
 *     FALSE: error
 */
BOOL Str_SetPtrAtoW (LPWSTR *lppDest, LPCSTR lpSrc)
{
    TRACE("(%p %s)\n", lppDest, lpSrc);

    if (lpSrc) {
	INT len = MultiByteToWideChar(CP_ACP,0,lpSrc,-1,NULL,0);
	LPWSTR ptr = ReAlloc (*lppDest, len*sizeof(WCHAR));

	if (!ptr)
	    return FALSE;
	MultiByteToWideChar(CP_ACP,0,lpSrc,-1,ptr,len);
	*lppDest = ptr;
    }
    else {
	if (*lppDest) {
	    Free (*lppDest);
	    *lppDest = NULL;
	}
    }

    return TRUE;
}


/**************************************************************************
 * DSA_Create [COMCTL32.320]
 *
 * Creates a dynamic storage array
 *
 * PARAMS
 *     nSize [I] size of the array elements
 *     nGrow [I] number of elements by which the array grows when it is filled
 *
 * RETURNS
 *     Success: pointer to an array control structure. Use this like a handle.
 *     Failure: NULL
 *
 * NOTES
 *     The DSA_ functions can be used to create and manipulate arrays of
 *     fixed-size memory blocks. These arrays can store any kind of data
 *     (e.g. strings and icons).
 */
HDSA WINAPI DSA_Create (INT nSize, INT nGrow)
{
    HDSA hdsa;

    TRACE("(size=%d grow=%d)\n", nSize, nGrow);

    hdsa = Alloc (sizeof(*hdsa));
    if (hdsa)
    {
	hdsa->nItemCount = 0;
        hdsa->pData = NULL;
	hdsa->nMaxCount = 0;
	hdsa->nItemSize = nSize;
	hdsa->nGrow = max(1, nGrow);
    }

    return hdsa;
}


/**************************************************************************
 * DSA_Destroy [COMCTL32.321]
 * 
 * Destroys a dynamic storage array
 *
 * PARAMS
 *     hdsa [I] pointer to the array control structure
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DSA_Destroy (const HDSA hdsa)
{
    TRACE("(%p)\n", hdsa);

    if (!hdsa)
	return FALSE;

    if (hdsa->pData && (!Free (hdsa->pData)))
	return FALSE;

    return Free (hdsa);
}


/**************************************************************************
 * DSA_GetItem [COMCTL32.322]
 *
 * Copies the specified item into a caller-supplied buffer.
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] number of the Item to get
 *     pDest  [O] destination buffer. Has to be >= dwElementSize.
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DSA_GetItem (const HDSA hdsa, INT nIndex, LPVOID pDest)
{
    LPVOID pSrc;

    TRACE("(%p %d %p)\n", hdsa, nIndex, pDest);

    if (!hdsa)
	return FALSE;
    if ((nIndex < 0) || (nIndex >= hdsa->nItemCount))
	return FALSE;

    pSrc = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
    memmove (pDest, pSrc, hdsa->nItemSize);

    return TRUE;
}


/**************************************************************************
 * DSA_GetItemPtr [COMCTL32.323]
 *
 * Retrieves a pointer to the specified item.
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] index of the desired item
 *
 * RETURNS
 *     Success: pointer to an item
 *     Failure: NULL
 */
LPVOID WINAPI DSA_GetItemPtr (const HDSA hdsa, INT nIndex)
{
    LPVOID pSrc;

    TRACE("(%p %d)\n", hdsa, nIndex);

    if (!hdsa)
	return NULL;
    if ((nIndex < 0) || (nIndex >= hdsa->nItemCount))
	return NULL;

    pSrc = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);

    TRACE("-- ret=%p\n", pSrc);

    return pSrc;
}


/**************************************************************************
 * DSA_SetItem [COMCTL32.325]
 *
 * Sets the contents of an item in the array.
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] index for the item
 *     pSrc   [I] pointer to the new item data
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DSA_SetItem (const HDSA hdsa, INT nIndex, LPVOID pSrc)
{
    INT  nSize, nNewItems;
    LPVOID pDest, lpTemp;

    TRACE("(%p %d %p)\n", hdsa, nIndex, pSrc);

    if ((!hdsa) || nIndex < 0)
	return FALSE;

    if (hdsa->nItemCount <= nIndex) {
	/* within the old array */
	if (hdsa->nMaxCount > nIndex) {
	    /* within the allocated space, set a new boundary */
	    hdsa->nItemCount = nIndex + 1;
	}
	else {
	    /* resize the block of memory */
	    nNewItems =
		hdsa->nGrow * ((INT)(((nIndex + 1) - 1) / hdsa->nGrow) + 1);
	    nSize = hdsa->nItemSize * nNewItems;

	    lpTemp = ReAlloc (hdsa->pData, nSize);
	    if (!lpTemp)
		return FALSE;

	    hdsa->nMaxCount = nNewItems;
	    hdsa->nItemCount = nIndex + 1;
	    hdsa->pData = lpTemp;
	}
    }

    /* put the new entry in */
    pDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
    TRACE("-- move dest=%p src=%p size=%d\n",
	   pDest, pSrc, hdsa->nItemSize);
    memmove (pDest, pSrc, hdsa->nItemSize);

    return TRUE;
}


/**************************************************************************
 * DSA_InsertItem [COMCTL32.324]
 *
 * Inserts an item into the array at the specified index.
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] index for the new item
 *     pSrc   [I] pointer to the element
 *
 * RETURNS
 *     Success: position of the new item
 *     Failure: -1
 */
INT WINAPI DSA_InsertItem (const HDSA hdsa, INT nIndex, LPVOID pSrc)
{
    INT   nNewItems, nSize;
    LPVOID  lpTemp, lpDest;

    TRACE("(%p %d %p)\n", hdsa, nIndex, pSrc);

    if ((!hdsa) || nIndex < 0)
	return -1;

    /* when nIndex >= nItemCount then append */
    if (nIndex >= hdsa->nItemCount)
 	nIndex = hdsa->nItemCount;

    /* do we need to resize ? */
    if (hdsa->nItemCount >= hdsa->nMaxCount) {
	nNewItems = hdsa->nMaxCount + hdsa->nGrow;
	nSize = hdsa->nItemSize * nNewItems;

	lpTemp = ReAlloc (hdsa->pData, nSize);
	if (!lpTemp)
	    return -1;

	hdsa->nMaxCount = nNewItems;
	hdsa->pData = lpTemp;
    }

    /* do we need to move elements ? */
    if (nIndex < hdsa->nItemCount) {
	lpTemp = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
	lpDest = (char *) lpTemp + hdsa->nItemSize;
	nSize = (hdsa->nItemCount - nIndex) * hdsa->nItemSize;
	TRACE("-- move dest=%p src=%p size=%d\n",
	       lpDest, lpTemp, nSize);
	memmove (lpDest, lpTemp, nSize);
    }

    /* ok, we can put the new Item in */
    hdsa->nItemCount++;
    lpDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
    TRACE("-- move dest=%p src=%p size=%d\n",
	   lpDest, pSrc, hdsa->nItemSize);
    memmove (lpDest, pSrc, hdsa->nItemSize);

    return nIndex;
}


/**************************************************************************
 * DSA_DeleteItem [COMCTL32.326]
 *
 * Deletes the specified item from the array.
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] index for the element to delete
 *
 * RETURNS
 *     Success: number of the deleted element
 *     Failure: -1
 */
INT WINAPI DSA_DeleteItem (const HDSA hdsa, INT nIndex)
{
    LPVOID lpDest,lpSrc;
    INT  nSize;

    TRACE("(%p %d)\n", hdsa, nIndex);

    if (!hdsa)
	return -1;
    if (nIndex < 0 || nIndex >= hdsa->nItemCount)
	return -1;

    /* do we need to move ? */
    if (nIndex < hdsa->nItemCount - 1) {
	lpDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
	lpSrc = (char *) lpDest + hdsa->nItemSize;
	nSize = hdsa->nItemSize * (hdsa->nItemCount - nIndex - 1);
	TRACE("-- move dest=%p src=%p size=%d\n",
	       lpDest, lpSrc, nSize);
	memmove (lpDest, lpSrc, nSize);
    }

    hdsa->nItemCount--;

    /* free memory ? */
    if ((hdsa->nMaxCount - hdsa->nItemCount) >= hdsa->nGrow) {
	nSize = hdsa->nItemSize * hdsa->nItemCount;

	lpDest = ReAlloc (hdsa->pData, nSize);
	if (!lpDest)
	    return -1;

	hdsa->nMaxCount = hdsa->nItemCount;
	hdsa->pData = lpDest;
    }

    return nIndex;
}


/**************************************************************************
 * DSA_DeleteAllItems [COMCTL32.327]
 *
 * Removes all items and reinitializes the array.
 *
 * PARAMS
 *     hdsa [I] pointer to the array control structure
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DSA_DeleteAllItems (const HDSA hdsa)
{
    TRACE("(%p)\n", hdsa);

    if (!hdsa)
	return FALSE;
    if (hdsa->pData && (!Free (hdsa->pData)))
	return FALSE;

    hdsa->nItemCount = 0;
    hdsa->pData = NULL;
    hdsa->nMaxCount = 0;

    return TRUE;
}


/**************************************************************************
 * DPA_Destroy [COMCTL32.329]
 *
 * Destroys a dynamic pointer array
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the pointer array
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DPA_Destroy (const HDPA hdpa)
{
    TRACE("(%p)\n", hdpa);

    if (!hdpa)
	return FALSE;

    if (hdpa->ptrs && (!HeapFree (hdpa->hHeap, 0, hdpa->ptrs)))
	return FALSE;

    return HeapFree (hdpa->hHeap, 0, hdpa);
}


/**************************************************************************
 * DPA_Grow [COMCTL32.330]
 *
 * Sets the growth amount.
 *
 * PARAMS
 *     hdpa  [I] handle (pointer) to the existing (source) pointer array
 *     nGrow [I] number of items by which the array grows when it's too small
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DPA_Grow (const HDPA hdpa, INT nGrow)
{
    TRACE("(%p %d)\n", hdpa, nGrow);

    if (!hdpa)
	return FALSE;

    hdpa->nGrow = max(8, nGrow);

    return TRUE;
}


/**************************************************************************
 * DPA_Clone [COMCTL32.331]
 *
 * Copies a pointer array to an other one or creates a copy
 *
 * PARAMS
 *     hdpa    [I] handle (pointer) to the existing (source) pointer array
 *     hdpaNew [O] handle (pointer) to the destination pointer array
 *
 * RETURNS
 *     Success: pointer to the destination pointer array.
 *     Failure: NULL
 *
 * NOTES
 *     - If the 'hdpaNew' is a NULL-Pointer, a copy of the source pointer
 *       array will be created and it's handle (pointer) is returned.
 *     - If 'hdpa' is a NULL-Pointer, the original implementation crashes,
 *       this implementation just returns NULL.
 */
HDPA WINAPI DPA_Clone (const HDPA hdpa, const HDPA hdpaNew)
{
    INT nNewItems, nSize;
    HDPA hdpaTemp;

    if (!hdpa)
	return NULL;

    TRACE("(%p %p)\n", hdpa, hdpaNew);

    if (!hdpaNew) {
	/* create a new DPA */
	hdpaTemp = HeapAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY,
				    sizeof(*hdpaTemp));
	hdpaTemp->hHeap = hdpa->hHeap;
	hdpaTemp->nGrow = hdpa->nGrow;
    }
    else
	hdpaTemp = hdpaNew;

    if (hdpaTemp->ptrs) {
	/* remove old pointer array */
	HeapFree (hdpaTemp->hHeap, 0, hdpaTemp->ptrs);
	hdpaTemp->ptrs = NULL;
	hdpaTemp->nItemCount = 0;
	hdpaTemp->nMaxCount = 0;
    }

    /* create a new pointer array */
    nNewItems = hdpaTemp->nGrow *
		((INT)((hdpa->nItemCount - 1) / hdpaTemp->nGrow) + 1);
    nSize = nNewItems * sizeof(LPVOID);
    hdpaTemp->ptrs = HeapAlloc (hdpaTemp->hHeap, HEAP_ZERO_MEMORY, nSize);
    hdpaTemp->nMaxCount = nNewItems;

    /* clone the pointer array */
    hdpaTemp->nItemCount = hdpa->nItemCount;
    memmove (hdpaTemp->ptrs, hdpa->ptrs,
	     hdpaTemp->nItemCount * sizeof(LPVOID));

    return hdpaTemp;
}


/**************************************************************************
 * DPA_GetPtr [COMCTL32.332]
 *
 * Retrieves a pointer from a dynamic pointer array
 *
 * PARAMS
 *     hdpa   [I] handle (pointer) to the pointer array
 *     nIndex [I] array index of the desired pointer
 *
 * RETURNS
 *     Success: pointer
 *     Failure: NULL
 */
LPVOID WINAPI DPA_GetPtr (const HDPA hdpa, INT nIndex)
{
    TRACE("(%p %d)\n", hdpa, nIndex);

    if (!hdpa)
	return NULL;
    if (!hdpa->ptrs) {
	WARN("no pointer array.\n");
	return NULL;
    }
    if ((nIndex < 0) || (nIndex >= hdpa->nItemCount)) {
	WARN("not enough pointers in array (%d vs %d).\n",nIndex,hdpa->nItemCount);
	return NULL;
    }

    TRACE("-- %p\n", hdpa->ptrs[nIndex]);

    return hdpa->ptrs[nIndex];
}


/**************************************************************************
 * DPA_GetPtrIndex [COMCTL32.333]
 *
 * Retrieves the index of the specified pointer
 *
 * PARAMS
 *     hdpa   [I] handle (pointer) to the pointer array
 *     p      [I] pointer
 *
 * RETURNS
 *     Success: index of the specified pointer
 *     Failure: -1
 */
INT WINAPI DPA_GetPtrIndex (const HDPA hdpa, LPVOID p)
{
    INT i;

    if (!hdpa || !hdpa->ptrs)
	return -1;

    for (i = 0; i < hdpa->nItemCount; i++) {
	if (hdpa->ptrs[i] == p)
	    return i;
    }

    return -1;
}


/**************************************************************************
 * DPA_InsertPtr [COMCTL32.334]
 *
 * Inserts a pointer into a dynamic pointer array
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the array
 *     i    [I] array index
 *     p    [I] pointer to insert
 *
 * RETURNS
 *     Success: index of the inserted pointer
 *     Failure: -1
 */
INT WINAPI DPA_InsertPtr (const HDPA hdpa, INT i, LPVOID p)
{
    TRACE("(%p %d %p)\n", hdpa, i, p);

    if (!hdpa || i < 0) return -1;

    if (i >= 0x7fff)
	i = hdpa->nItemCount;

    if (i >= hdpa->nItemCount)
	return DPA_SetPtr(hdpa, i, p) ? i : -1;

    /* create empty spot at the end */
    if (!DPA_SetPtr(hdpa, hdpa->nItemCount, 0)) return -1;
    memmove (hdpa->ptrs + i + 1, hdpa->ptrs + i, (hdpa->nItemCount - i - 1) * sizeof(LPVOID));
    hdpa->ptrs[i] = p;
    return i;
}

/**************************************************************************
 * DPA_SetPtr [COMCTL32.335]
 *
 * Sets a pointer in the pointer array
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the pointer array
 *     i    [I] index of the pointer that will be set
 *     p    [I] pointer to be set
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DPA_SetPtr (const HDPA hdpa, INT i, LPVOID p)
{
    LPVOID *lpTemp;

    TRACE("(%p %d %p)\n", hdpa, i, p);

    if (!hdpa || i < 0 || i > 0x7fff)
	return FALSE;

    if (hdpa->nItemCount <= i) {
	/* within the old array */
	if (hdpa->nMaxCount <= i) {
	    /* resize the block of memory */
	    INT nNewItems =
		hdpa->nGrow * ((INT)(((i+1) - 1) / hdpa->nGrow) + 1);
	    INT nSize = nNewItems * sizeof(LPVOID);

	    if (hdpa->ptrs)
	        lpTemp = HeapReAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY, hdpa->ptrs, nSize);
	    else
		lpTemp = HeapAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY, nSize);
	    
	    if (!lpTemp)
		return FALSE;

	    hdpa->nMaxCount = nNewItems;
	    hdpa->ptrs = lpTemp;
	}
        hdpa->nItemCount = i+1;
    }

    /* put the new entry in */
    hdpa->ptrs[i] = p;

    return TRUE;
}


/**************************************************************************
 * DPA_DeletePtr [COMCTL32.336]
 *
 * Removes a pointer from the pointer array.
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the pointer array
 *     i    [I] index of the pointer that will be deleted
 *
 * RETURNS
 *     Success: deleted pointer
 *     Failure: NULL
 */
LPVOID WINAPI DPA_DeletePtr (const HDPA hdpa, INT i)
{
    LPVOID *lpDest, *lpSrc, lpTemp = NULL;
    INT  nSize;

    TRACE("(%p %d)\n", hdpa, i);

    if ((!hdpa) || i < 0 || i >= hdpa->nItemCount)
	return NULL;

    lpTemp = hdpa->ptrs[i];

    /* do we need to move ?*/
    if (i < hdpa->nItemCount - 1) {
	lpDest = hdpa->ptrs + i;
	lpSrc = lpDest + 1;
	nSize = (hdpa->nItemCount - i - 1) * sizeof(LPVOID);
	TRACE("-- move dest=%p src=%p size=%x\n",
	       lpDest, lpSrc, nSize);
	memmove (lpDest, lpSrc, nSize);
    }

    hdpa->nItemCount --;

    /* free memory ?*/
    if ((hdpa->nMaxCount - hdpa->nItemCount) >= hdpa->nGrow) {
	INT nNewItems = max(hdpa->nGrow * 2, hdpa->nItemCount);
	nSize = nNewItems * sizeof(LPVOID);
	lpDest = HeapReAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY,
				      hdpa->ptrs, nSize);
	if (!lpDest)
	    return NULL;

	hdpa->nMaxCount = nNewItems;
	hdpa->ptrs = (LPVOID*)lpDest;
    }

    return lpTemp;
}


/**************************************************************************
 * DPA_DeleteAllPtrs [COMCTL32.337]
 *
 * Removes all pointers and reinitializes the array.
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the pointer array
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DPA_DeleteAllPtrs (const HDPA hdpa)
{
    TRACE("(%p)\n", hdpa);

    if (!hdpa)
	return FALSE;

    if (hdpa->ptrs && (!HeapFree (hdpa->hHeap, 0, hdpa->ptrs)))
	return FALSE;

    hdpa->nItemCount = 0;
    hdpa->nMaxCount = hdpa->nGrow * 2;
    hdpa->ptrs = HeapAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY,
				     hdpa->nMaxCount * sizeof(LPVOID));

    return TRUE;
}


/**************************************************************************
 * DPA_QuickSort [Internal]
 *
 * Ordinary quicksort (used by DPA_Sort).
 *
 * PARAMS
 *     lpPtrs     [I] pointer to the pointer array
 *     l          [I] index of the "left border" of the partition
 *     r          [I] index of the "right border" of the partition
 *     pfnCompare [I] pointer to the compare function
 *     lParam     [I] user defined value (3rd parameter in compare function)
 *
 * RETURNS
 *     NONE
 */
static VOID DPA_QuickSort (LPVOID *lpPtrs, INT l, INT r,
                           PFNDPACOMPARE pfnCompare, LPARAM lParam)
{
    INT m;
    LPVOID t;

    TRACE("l=%i r=%i\n", l, r);

    if (l==r)    /* one element is always sorted */
        return;
    if (r<l)     /* oops, got it in the wrong order */
	{
        DPA_QuickSort(lpPtrs, r, l, pfnCompare, lParam);
        return;
	}
    m = (l+r)/2; /* divide by two */
    DPA_QuickSort(lpPtrs, l, m, pfnCompare, lParam);
    DPA_QuickSort(lpPtrs, m+1, r, pfnCompare, lParam);

    /* join the two sides */
    while( (l<=m) && (m<r) )
    {
        if(pfnCompare(lpPtrs[l],lpPtrs[m+1],lParam)>0)
        {
            t = lpPtrs[m+1];
            memmove(&lpPtrs[l+1],&lpPtrs[l],(m-l+1)*sizeof(lpPtrs[l]));
            lpPtrs[l] = t;

            m++;
        }
        l++;
    }
}


/**************************************************************************
 * DPA_Sort [COMCTL32.338]
 *
 * Sorts a pointer array using a user defined compare function
 *
 * PARAMS
 *     hdpa       [I] handle (pointer) to the pointer array
 *     pfnCompare [I] pointer to the compare function
 *     lParam     [I] user defined value (3rd parameter of compare function)
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */
BOOL WINAPI DPA_Sort (const HDPA hdpa, PFNDPACOMPARE pfnCompare, LPARAM lParam)
{
    if (!hdpa || !pfnCompare)
	return FALSE;

    TRACE("(%p %p 0x%lx)\n", hdpa, pfnCompare, lParam);

    if ((hdpa->nItemCount > 1) && (hdpa->ptrs))
	DPA_QuickSort (hdpa->ptrs, 0, hdpa->nItemCount - 1,
		       pfnCompare, lParam);

    return TRUE;
}


/**************************************************************************
 * DPA_Search [COMCTL32.339]
 *
 * Searches a pointer array for a specified pointer
 *
 * PARAMS
 *     hdpa       [I] handle (pointer) to the pointer array
 *     pFind      [I] pointer to search for
 *     nStart     [I] start index
 *     pfnCompare [I] pointer to the compare function
 *     lParam     [I] user defined value (3rd parameter of compare function)
 *     uOptions   [I] search options
 *
 * RETURNS
 *     Success: index of the pointer in the array.
 *     Failure: -1
 *
 * NOTES
 *     Binary search taken from R.Sedgewick "Algorithms in C"!
 *     Function is NOT tested!
 *     If something goes wrong, blame HIM not ME! (Eric Kohl)
 */
INT WINAPI DPA_Search (const HDPA hdpa, LPVOID pFind, INT nStart,
                       PFNDPACOMPARE pfnCompare, LPARAM lParam, UINT uOptions)
{
    if (!hdpa || !pfnCompare || !pFind)
	return -1;

    TRACE("(%p %p %d %p 0x%08lx 0x%08x)\n",
	   hdpa, pFind, nStart, pfnCompare, lParam, uOptions);

    if (uOptions & DPAS_SORTED) {
	/* array is sorted --> use binary search */
	INT l, r, x, n;
	LPVOID *lpPtr;

	TRACE("binary search\n");

	l = (nStart == -1) ? 0 : nStart;
	r = hdpa->nItemCount - 1;
	lpPtr = hdpa->ptrs;
	while (r >= l) {
	    x = (l + r) / 2;
	    n = (pfnCompare)(pFind, lpPtr[x], lParam);
	    if (n < 0)
		r = x - 1;
	    else
		l = x + 1;
	    if (n == 0) {
		TRACE("-- ret=%d\n", n);
		return n;
	    }
	}

	if (uOptions & DPAS_INSERTBEFORE) {
	    if (r == -1) r = 0;
	    TRACE("-- ret=%d\n", r);
	    return r;
	}

	if (uOptions & DPAS_INSERTAFTER) {
	    TRACE("-- ret=%d\n", l);
	    return l;
	}
    }
    else {
	/* array is not sorted --> use linear search */
	LPVOID *lpPtr;
	INT  nIndex;

	TRACE("linear search\n");

	nIndex = (nStart == -1)? 0 : nStart;
	lpPtr = hdpa->ptrs;
	for (; nIndex < hdpa->nItemCount; nIndex++) {
	    if ((pfnCompare)(pFind, lpPtr[nIndex], lParam) == 0) {
		TRACE("-- ret=%d\n", nIndex);
		return nIndex;
	    }
	}
    }

    TRACE("-- not found: ret=-1\n");
    return -1;
}


/**************************************************************************
 * DPA_CreateEx [COMCTL32.340]
 *
 * Creates a dynamic pointer array using the specified size and heap.
 *
 * PARAMS
 *     nGrow [I] number of items by which the array grows when it is filled
 *     hHeap [I] handle to the heap where the array is stored
 *
 * RETURNS
 *     Success: handle (pointer) to the pointer array.
 *     Failure: NULL
 *
 * NOTES
 *     The DPA_ functions can be used to create and manipulate arrays of
 *     pointers.
 */
HDPA WINAPI DPA_CreateEx (INT nGrow, HANDLE hHeap)
{
    HDPA hdpa;

    TRACE("(%d %p)\n", nGrow, hHeap);

    if (hHeap)
	hdpa = HeapAlloc (hHeap, HEAP_ZERO_MEMORY, sizeof(*hdpa));
    else
	hdpa = Alloc (sizeof(*hdpa));

    if (hdpa) {
	hdpa->nGrow = max(8, nGrow);
	hdpa->hHeap = hHeap ? hHeap : GetProcessHeap();
	hdpa->nMaxCount = hdpa->nGrow * 2;
	hdpa->ptrs = HeapAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY,
				hdpa->nMaxCount * sizeof(LPVOID));
    }

    TRACE("-- %p\n", hdpa);

    return hdpa;
}


/**************************************************************************
 * DPA_Create [COMCTL32.328]
 *
 * Creates a dynamic pointer array.
 *
 * PARAMS
 *     nGrow [I] number of items by which the array grows when it is filled
 *
 * RETURNS
 *     Success: handle (pointer) to the pointer array.
 *     Failure: NULL
 *
 * NOTES
 *     The DPA_ functions can be used to create and manipulate arrays of
 *     pointers.
 */
HDPA WINAPI DPA_Create (INT nGrow)
{
    return DPA_CreateEx( nGrow, 0 );
}


/**************************************************************************
 * Notification functions
 */

typedef struct tagNOTIFYDATA
{
    HWND hwndFrom;
    HWND hwndTo;
    DWORD  dwParam3;
    DWORD  dwParam4;
    DWORD  dwParam5;
    DWORD  dwParam6;
} NOTIFYDATA, *LPNOTIFYDATA;


/**************************************************************************
 * DoNotify [Internal]
 */

static LRESULT DoNotify (LPNOTIFYDATA lpNotify, UINT uCode, LPNMHDR lpHdr)
{
    NMHDR nmhdr;
    LPNMHDR lpNmh = NULL;
    UINT idFrom = 0;

    TRACE("(%p %p %d %p 0x%08lx)\n",
	   lpNotify->hwndFrom, lpNotify->hwndTo, uCode, lpHdr,
	   lpNotify->dwParam5);

    if (!lpNotify->hwndTo)
	return 0;

    if (lpNotify->hwndFrom == (HWND)-1) {
	lpNmh = lpHdr;
	idFrom = lpHdr->idFrom;
    }
    else {
	if (lpNotify->hwndFrom)
	    idFrom = GetDlgCtrlID (lpNotify->hwndFrom);

	lpNmh = (lpHdr) ? lpHdr : &nmhdr;

	lpNmh->hwndFrom = lpNotify->hwndFrom;
	lpNmh->idFrom = idFrom;
	lpNmh->code = uCode;
    }

    return SendMessageW (lpNotify->hwndTo, WM_NOTIFY, idFrom, (LPARAM)lpNmh);
}


/**************************************************************************
 * SendNotify [COMCTL32.341]
 *
 * Sends a WM_NOTIFY message to the specified window.
 *
 * PARAMS
 *     hwndTo   [I] Window to receive the message
 *     hwndFrom [I] Window that the message is from (see notes)
 *     uCode    [I] Notification code
 *     lpHdr    [I] The NMHDR and any additional information to send or NULL
 *
 * RETURNS
 *     Success: return value from notification
 *     Failure: 0
 *
 * NOTES
 *     If hwndFrom is -1 then the identifier of the control sending the
 *     message is taken from the NMHDR structure.
 *     If hwndFrom is not -1 then lpHdr can be NULL.
 */
LRESULT WINAPI SendNotify (HWND hwndTo, HWND hwndFrom, UINT uCode, LPNMHDR lpHdr)
{
    NOTIFYDATA notify;

    TRACE("(%p %p %d %p)\n",
	   hwndTo, hwndFrom, uCode, lpHdr);

    notify.hwndFrom = hwndFrom;
    notify.hwndTo   = hwndTo;
    notify.dwParam5 = 0;
    notify.dwParam6 = 0;

    return DoNotify (&notify, uCode, lpHdr);
}


/**************************************************************************
 * SendNotifyEx [COMCTL32.342]
 *
 * Sends a WM_NOTIFY message to the specified window.
 *
 * PARAMS
 *     hwndFrom [I] Window to receive the message
 *     hwndTo   [I] Window that the message is from
 *     uCode    [I] Notification code
 *     lpHdr    [I] The NMHDR and any additional information to send or NULL
 *     dwParam5 [I] Unknown
 *
 * RETURNS
 *     Success: return value from notification
 *     Failure: 0
 *
 * NOTES
 *     If hwndFrom is -1 then the identifier of the control sending the
 *     message is taken from the NMHDR structure.
 *     If hwndFrom is not -1 then lpHdr can be NULL.
 */
LRESULT WINAPI SendNotifyEx (HWND hwndTo, HWND hwndFrom, UINT uCode,
                             LPNMHDR lpHdr, DWORD dwParam5)
{
    NOTIFYDATA notify;
    HWND hwndNotify;

    TRACE("(%p %p %d %p 0x%08lx)\n",
	   hwndFrom, hwndTo, uCode, lpHdr, dwParam5);

    hwndNotify = hwndTo;
    if (!hwndTo) {
	if (IsWindow (hwndFrom)) {
	    hwndNotify = GetParent (hwndFrom);
	    if (!hwndNotify)
		return 0;
	}
    }

    notify.hwndFrom = hwndFrom;
    notify.hwndTo   = hwndNotify;
    notify.dwParam5 = dwParam5;
    notify.dwParam6 = 0;

    return DoNotify (&notify, uCode, lpHdr);
}


/**************************************************************************
 * DPA_EnumCallback [COMCTL32.385]
 *
 * Enumerates all items in a dynamic pointer array.
 *
 * PARAMS
 *     hdpa     [I] handle to the dynamic pointer array
 *     enumProc [I]
 *     lParam   [I]
 *
 * RETURNS
 *     none
 */
VOID WINAPI DPA_EnumCallback (HDPA hdpa, PFNDPAENUMCALLBACK enumProc,
                              LPVOID lParam)
{
    INT i;

    TRACE("(%p %p %p)\n", hdpa, enumProc, lParam);

    if (!hdpa)
	return;
    if (hdpa->nItemCount <= 0)
	return;

    for (i = 0; i < hdpa->nItemCount; i++) {
	if ((enumProc)(hdpa->ptrs[i], lParam) == 0)
	    return;
    }

    return;
}


/**************************************************************************
 * DPA_DestroyCallback [COMCTL32.386]
 *
 * Enumerates all items in a dynamic pointer array and destroys it.
 *
 * PARAMS
 *     hdpa     [I] handle to the dynamic pointer array
 *     enumProc [I]
 *     lParam   [I]
 *
 * RETURNS
 *     none
 */
void WINAPI DPA_DestroyCallback (HDPA hdpa, PFNDPAENUMCALLBACK enumProc,
                                 LPVOID lParam)
{
    TRACE("(%p %p %p)\n", hdpa, enumProc, lParam);

    DPA_EnumCallback (hdpa, enumProc, lParam);
    DPA_Destroy (hdpa);
}


/**************************************************************************
 * DSA_EnumCallback [COMCTL32.387]
 *
 * Enumerates all items in a dynamic storage array.
 *
 * PARAMS
 *     hdsa     [I] handle to the dynamic storage array
 *     enumProc [I]
 *     lParam   [I]
 *
 * RETURNS
 *     none
 */
VOID WINAPI DSA_EnumCallback (HDSA hdsa, PFNDSAENUMCALLBACK enumProc,
                              LPVOID lParam)
{
    INT i;

    TRACE("(%p %p %p)\n", hdsa, enumProc, lParam);

    if (!hdsa)
	return;
    if (hdsa->nItemCount <= 0)
	return;

    for (i = 0; i < hdsa->nItemCount; i++) {
	LPVOID lpItem = DSA_GetItemPtr (hdsa, i);
	if ((enumProc)(lpItem, lParam) == 0)
	    return;
    }

    return;
}


/**************************************************************************
 * DSA_DestroyCallback [COMCTL32.388]
 *
 * Enumerates all items in a dynamic storage array and destroys it.
 *
 * PARAMS
 *     hdsa     [I] handle to the dynamic storage array
 *     enumProc [I]
 *     lParam   [I]
 *
 * RETURNS
 *     none
 */
void WINAPI DSA_DestroyCallback (HDSA hdsa, PFNDSAENUMCALLBACK enumProc,
                                 LPVOID lParam)
{
    TRACE("(%p %p %p)\n", hdsa, enumProc, lParam);

    DSA_EnumCallback (hdsa, enumProc, lParam);
    DSA_Destroy (hdsa);
}