clip the moving rectangle to the desktop area. This doesn't work because our SelectObject() implementation doesn't handle regions right atm.

reactos/lib/user32/windows

diff -u -r1.130 -r1.131
--- defwnd.c	5 Apr 2004 22:12:53 -0000	1.130
+++ defwnd.c	5 Apr 2004 22:42:11 -0000	1.131
@@ -1,4 +1,4 @@

-/* $Id: defwnd.c,v 1.130 2004/04/05 22:12:53 weiden Exp $

+/* $Id: defwnd.c,v 1.131 2004/04/05 22:42:11 weiden Exp $

  *
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS user32.dll

@@ -458,19 +458,32 @@

 }
 
 VOID STATIC

-UserDrawMovingFrame(HDC hdc, RECT *rect, BOOL thickframe)

+UserDrawMovingFrame(HDC hdc, RECT *rect, BOOL thickframe, HRGN ClipRgn)

 {

-  if (thickframe)
-    {
-      UserDrawWindowFrame(hdc, rect, GetSystemMetrics(SM_CXFRAME),
-			  GetSystemMetrics(SM_CYFRAME));
-    }
-  else DrawFocusRect( hdc, rect );

+  HGDIOBJ OldObj;
+  
+  if(ClipRgn)
+  {
+    OldObj = SelectObject(hdc, ClipRgn);
+  }
+  
+  if(thickframe)
+  {
+    UserDrawWindowFrame(hdc, rect, GetSystemMetrics(SM_CXFRAME), GetSystemMetrics(SM_CYFRAME));
+  }
+  else
+    DrawFocusRect( hdc, rect );
+  
+  if(ClipRgn)
+  {
+    SelectObject(hdc, OldObj);
+  }

 }
 
 VOID STATIC
 DefWndDoSizeMove(HWND hwnd, WORD wParam)
 {

+  HRGN DesktopRgn;

   MSG msg;
   RECT sizingRect, mouseRect, origRect, clipRect;
   HDC hdc;

@@ -589,10 +602,12 @@

     {
       /* Retrieve a default cache DC (without using the window style) */
       hdc = GetDCEx(hWndParent, 0, DCX_CACHE);

+      DesktopRgn = NULL;

     }
   else
     {
       hdc = GetDC( 0 );

+      DesktopRgn = CreateRectRgnIndirect(&clipRect);

     }
   
   if( iconic ) /* create a cursor for dragging */

@@ -606,7 +621,7 @@

   /* invert frame if WIN31_LOOK to indicate mouse click on caption */
   if( !iconic && !DragFullWindows)
     {

-      UserDrawMovingFrame( hdc, &sizingRect, thickframe );

+      UserDrawMovingFrame( hdc, &sizingRect, thickframe, DesktopRgn );

     }
   
   for(;;)

@@ -622,9 +637,9 @@

       
       if (msg.message == WM_PAINT)
         {

-	  if(!iconic && !DragFullWindows) UserDrawMovingFrame( hdc, &sizingRect, thickframe );

+	  if(!iconic && !DragFullWindows) UserDrawMovingFrame( hdc, &sizingRect, thickframe, DesktopRgn );

 	  UpdateWindow( msg.hwnd );

-	  if(!iconic && !DragFullWindows) UserDrawMovingFrame( hdc, &sizingRect, thickframe );

+	  if(!iconic && !DragFullWindows) UserDrawMovingFrame( hdc, &sizingRect, thickframe, DesktopRgn );

 	  continue;
         }
       

@@ -673,7 +688,7 @@

 	      else if (ON_RIGHT_BORDER(hittest)) newRect.right += dx;
 	      if (ON_TOP_BORDER(hittest)) newRect.top += dy;
 	      else if (ON_BOTTOM_BORDER(hittest)) newRect.bottom += dy;

-	      if(!iconic && !DragFullWindows) UserDrawMovingFrame( hdc, &sizingRect, thickframe );

+	      if(!iconic && !DragFullWindows) UserDrawMovingFrame( hdc, &sizingRect, thickframe, DesktopRgn );

 	      capturePoint = pt;
 	      
 	      /* determine the hit location */

@@ -684,7 +699,7 @@

 	      if (!iconic)
 		{
 		  if(!DragFullWindows)

-		    UserDrawMovingFrame( hdc, &newRect, thickframe );

+		    UserDrawMovingFrame( hdc, &newRect, thickframe, DesktopRgn );

 		  else {
 		    /* To avoid any deadlocks, all the locks on the windows
 		       structures must be suspended before the SetWindowPos */

@@ -711,12 +726,18 @@

       DestroyCursor( hDragCursor );
     }
   else if(!DragFullWindows)

-      UserDrawMovingFrame( hdc, &sizingRect, thickframe );

+      UserDrawMovingFrame( hdc, &sizingRect, thickframe, DesktopRgn );

   
   if (Style & WS_CHILD)
     ReleaseDC( hWndParent, hdc );
   else

+  {

     ReleaseDC( 0, hdc );

+    if(DesktopRgn)
+    {
+      DeleteObject(DesktopRgn);
+    }
+  }

   
   SendMessageA( hwnd, WM_EXITSIZEMOVE, 0, 0 );
   SendMessageA( hwnd, WM_SETVISIBLE, !IsIconic(hwnd), 0L);