From f529b441b27c00f602c91e27573aadbef66c54a9 Mon Sep 17 00:00:00 2001
From: James Tabor <james.tabor@reactos.org>
Date: Wed, 12 Aug 2009 07:42:30 +0000
Subject: [PATCH] - Check if server side window proc is set when clearing or
 setting dialog window flag.

svn path=/trunk/; revision=42633
---
 reactos/subsystems/win32/win32k/ntuser/simplecall.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/reactos/subsystems/win32/win32k/ntuser/simplecall.c b/reactos/subsystems/win32/win32k/ntuser/simplecall.c
index 17fc8bf1500..e01717fad77 100644
--- a/reactos/subsystems/win32/win32k/ntuser/simplecall.c
+++ b/reactos/subsystems/win32/win32k/ntuser/simplecall.c
@@ -820,7 +820,8 @@ NtUserCallHwndParam(
 
          pWnd = Window->Wnd;
          if (pWnd->head.pti->ppi == PsGetCurrentProcessWin32Process() &&
-             pWnd->cbwndExtra == DLGWINDOWEXTRA)
+             pWnd->cbwndExtra == DLGWINDOWEXTRA && 
+             !(pWnd->state & WNDS_SERVERSIDEWINDOWPROC))
          {
             if (Param)
             {