[PATCH] Better stub for LockWindowUpdate

[Ryan Cumming <ryan@completely.kicks-ass.org>]

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Hi,

My full implementation of LockWindowUpdate caused drawing errors in Kazaa. So, 
all I have to offer is this smallish patch which makes LockWindowUpdate 
return more Windows-like return values.

- -Ryan
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Index: windows/dce.c
===================================================================
RCS file: /home/wine/wine/windows/dce.c,v
retrieving revision 1.71
diff -u -r1.71 dce.c
--- windows/dce.c	31 May 2002 23:06:54 -0000	1.71
+++ windows/dce.c	7 Jul 2002 00:00:19 -0000
@@ -44,6 +44,7 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(dc);
 
+static HWND lockedWnd = 0;
 static DCE *firstDCE;
 static HDC defaultDCstate;
 
@@ -652,6 +653,29 @@
  */
 BOOL WINAPI LockWindowUpdate( HWND hwnd )
 {
-    FIXME("(%x), stub!\n",hwnd);
+    FIXME("(%x), partial stub!\n",hwnd);
+
+    USER_Lock();
+
+    if (lockedWnd)
+    {
+        if (!hwnd)
+        {
+            /* Unlock lockedWnd */
+            /* FIXME: Do something */
+        }
+        else
+        {
+            /* Attempted to lock a second window */
+            /* Return FALSE and do nothing */
+            USER_Unlock();
+            return FALSE;
+        }
+    }
+
+    lockedWnd = hwnd;
+
+    USER_Unlock();
+
     return TRUE;
 }