[jimtabor] 30989: Fix dce test. User32 wine test 57 pass and only 2 fail.

Author: jimtabor
Date: Tue Dec  4 01:03:26 2007
New Revision: 30989

URL: http://svn.reactos.org/svn/reactos?rev=30989&view=rev
Log:
Fix dce test. User32 wine test 57 pass and only 2 fail. 

Modified:
    trunk/reactos/dll/win32/user32/windows/nonclient.c

Modified: trunk/reactos/dll/win32/user32/windows/nonclient.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/user32/windows/n…
==============================================================================
--- trunk/reactos/dll/win32/user32/windows/nonclient.c (original)
+++ trunk/reactos/dll/win32/user32/windows/nonclient.c Tue Dec  4 01:03:26 2007
@@ -258,7 +258,15 @@
    UserDrawCaptionButton(&WindowRect, Style, ExStyle, hDC, bDown, Type);
 }
 
+// Note from Wine:
+/* MSDN docs are pretty idiotic here, they say app CAN use clipRgn in
+   the call to GetDCEx implying that it is allowed not to use it either.
+   However, the suggested GetDCEx(    , DCX_WINDOW | DCX_INTERSECTRGN)
+   will cause clipRgn to be deleted after ReleaseDC().
+   Now, how is the "system" supposed to tell what happened?
+ */
 #define DCX_USESTYLE     0x00010000
+#define DCX_KEEPCLIPRGN  0x00040000 // <-- You do this!
 /*
  * FIXME:
  * - Drawing of WS_BORDER after scrollbars
@@ -277,7 +285,7 @@
 
    Style = GetWindowLongW(hWnd, GWL_STYLE);
 
-   hDC = GetDCEx(hWnd, hRgn, DCX_WINDOW | DCX_INTERSECTRGN | DCX_USESTYLE);
+   hDC = GetDCEx(hWnd, hRgn, DCX_WINDOW | DCX_INTERSECTRGN | DCX_USESTYLE |
DCX_KEEPCLIPRGN);
    if (hDC == 0)
    {
       return 0;