[User32]

- Add corrected behavior for SetWindowRgn, delete region object after setting windows region. See bug 4980.
- After a successful call to SetWindowRgn, the system owns the region specified by the region handle hRgn. The system does not make a copy of the region. Thus, you should not make any further function calls with this region handle. In particular, do not delete this region handle. The system deletes the region handle when it no longer needed.
- References : http://msdn.microsoft.com/en-us/library/dd145102(VS.85).aspx

svn path=/trunk/; revision=45013

reactos/dll/win32/user32/windows/paint.c

@@ -149,7 +149,13 @@ SetWindowRgn(
    Hook = BeginIfHookedUserApiHook();
 
    /* Bypass SEH and go direct. */
-   if (!Hook) return (int)NtUserSetWindowRgn(hWnd, hRgn, bRedraw);
+   if (!Hook)
+   {
+      Ret = NtUserSetWindowRgn(hWnd, hRgn, bRedraw);
+      if (hRgn && Ret)
+          DeleteObject(hRgn);
+      return Ret;
+   }
 
    _SEH2_TRY
    {