From 609a60c719a4719c6b7a63a9e3c86bf1eed0b716 Mon Sep 17 00:00:00 2001
From: Filip Navara <filip.navara@gmail.com>
Date: Tue, 26 Jul 2005 16:03:46 +0000
Subject: [PATCH] Add check for global handles to NtGdiDeleteDC, this prevents
 applications from destroying DCs that are part of DCEs.

svn path=/trunk/; revision=16748
---
 reactos/subsys/win32k/objects/dc.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/reactos/subsys/win32k/objects/dc.c b/reactos/subsys/win32k/objects/dc.c
index e436def9dd3..3516afc4e25 100644
--- a/reactos/subsys/win32k/objects/dc.c
+++ b/reactos/subsys/win32k/objects/dc.c
@@ -962,10 +962,17 @@ NtGdiDeleteDC(HDC  DCHandle)
 {
   PDC  DCToDelete;
 
+  if (!GDIOBJ_OwnedByCurrentProcess(DCHandle))
+    {
+      SetLastWin32Error(ERROR_INVALID_HANDLE);
+      return FALSE;
+    }
+  
   DCToDelete = DC_LockDc(DCHandle);
   if (DCToDelete == NULL)
     {
-      return  FALSE;
+      SetLastWin32Error(ERROR_INVALID_HANDLE);
+      return FALSE;
     }
 
   /*  First delete all saved DCs  */