commit e6c6390c21c74008637564062d9840c15dbc5a72
author Marcus Meissner <marcus@jet.franken.de> Sun Dec 12 19:39:37 1999 +0000
committer Alexandre Julliard <julliard@winehq.org> Sun Dec 12 19:39:37 1999 +0000
tree 210a4b3e581d25e5c94d173fa33505bd4651bfb6
parent 7377a162975c0783a2484ecab45f03ab95e1a2f2

Check for passed invalid window handle in DefMDIChildProc*.

windows/mdi.c

diff --git a/windows/mdi.c b/windows/mdi.c
index ed2d49d..b67ada1 100644
--- a/windows/mdi.c
+++ b/windows/mdi.c
@@ -1483,8 +1483,11 @@
     WND                 *clientWnd,*tmpWnd = 0;
     LRESULT             retvalue;
 
-    clientWnd  = WIN_FindWndPtr(GetParent16(hwnd));
+    tmpWnd     = WIN_FindWndPtr(hwnd);
+    if (!tmpWnd) return 0;
+    clientWnd  = WIN_FindWndPtr(tmpWnd->parent->hwndSelf);
     ci         = (MDICLIENTINFO *) clientWnd->wExtra;
+    WIN_ReleaseWndPtr(tmpWnd);
 
     switch (message)
     {
@@ -1666,6 +1669,7 @@
     LRESULT             retvalue;
 
     tmpWnd     = WIN_FindWndPtr(hwnd);
+    if (!tmpWnd) return 0;
     clientWnd  = WIN_FindWndPtr(tmpWnd->parent->hwndSelf);
     ci         = (MDICLIENTINFO *) clientWnd->wExtra;
     WIN_ReleaseWndPtr(tmpWnd);
@@ -1731,11 +1735,14 @@
                                    WPARAM wParam, LPARAM lParam )
 {
     MDICLIENTINFO       *ci;
-    WND                 *clientWnd;
+    WND                 *clientWnd,*tmpWnd;
     LRESULT             retvalue;
 
-    clientWnd  = WIN_FindWndPtr(GetParent16(hwnd));
+    tmpWnd     = WIN_FindWndPtr(hwnd);
+    if (!tmpWnd) return 0;
+    clientWnd  = WIN_FindWndPtr(tmpWnd->parent->hwndSelf);
     ci         = (MDICLIENTINFO *) clientWnd->wExtra;
+    WIN_ReleaseWndPtr(tmpWnd);
 
     switch (message)
     {