Moved ScrollWindowEx implementation to the graphics driver.

include/user.h

diff --git a/include/user.h b/include/user.h
index 494f7f3..6837989 100644
--- a/include/user.h
+++ b/include/user.h
@@ -75,6 +75,7 @@
     BOOL   (*pDestroyWindow)(HWND);
     BOOL   (*pGetDC)(HWND,HDC,HRGN,DWORD);
     BOOL   (*pEnableWindow)(HWND,BOOL);
+    INT    (*pScrollWindowEx)(HWND,INT,INT,const RECT*,const RECT*,HRGN,LPRECT,UINT);
     void   (*pSetFocus)(HWND);
     HWND   (*pSetParent)(HWND,HWND);
     BOOL   (*pSetWindowPos)(WINDOWPOS *);

include/win.h

diff --git a/include/win.h b/include/win.h
index 310b4c9..2ccf79d 100644
--- a/include/win.h
+++ b/include/win.h
@@ -71,7 +71,6 @@
 typedef struct tagWND_DRIVER
 {
     void   (*pForceWindowRaise)(WND *);
-    void   (*pSurfaceCopy)(WND *, HDC, INT, INT, const RECT *, BOOL);
     BOOL   (*pSetHostAttr)(WND *, INT haKey, INT value);
 } WND_DRIVER;