user32: IsChild must not consider the desktop window.

dlls/user32/message.c

@@ -303,7 +303,7 @@ static inline BOOL is_mouse_message( UINT message )
 /* check whether message matches the specified hwnd filter */
 static inline BOOL check_hwnd_filter( const MSG *msg, HWND hwnd_filter )
 {
-    if (!hwnd_filter) return TRUE;
+    if (!hwnd_filter || hwnd_filter == GetDesktopWindow()) return TRUE;
     return (msg->hwnd == hwnd_filter || IsChild( hwnd_filter, msg->hwnd ));
 }
 

dlls/user32/tests/msg.c

@@ -7476,9 +7476,7 @@ static void test_DestroyWindow(void)
     /* test owner/parent of the parent */
     test = GetParent(parent);
     ok(!test, "wrong parent %p\n", test);
-todo_wine {
     ok(!IsChild(GetDesktopWindow(), parent), "wrong parent/child %p/%p\n", GetDesktopWindow(), parent);
-}
     if(pGetAncestor) {
         test = pGetAncestor(parent, GA_PARENT);
         ok(test == GetDesktopWindow(), "wrong parent %p\n", test);

dlls/user32/tests/win.c

@@ -2758,27 +2758,21 @@ static void test_SetParent(void)
     check_parents(child3, child2, child2, child2, 0, child2, parent);
     check_parents(child4, desktop, child2, child2, child2, child4, parent);
 
-todo_wine {
     ok(!IsChild(desktop, parent), "wrong parent/child %p/%p\n", desktop, parent);
     ok(!IsChild(desktop, child1), "wrong parent/child %p/%p\n", desktop, child1);
     ok(!IsChild(desktop, child2), "wrong parent/child %p/%p\n", desktop, child2);
     ok(!IsChild(desktop, child3), "wrong parent/child %p/%p\n", desktop, child3);
     ok(!IsChild(desktop, child4), "wrong parent/child %p/%p\n", desktop, child4);
-}
 
     ok(IsChild(parent, child1), "wrong parent/child %p/%p\n", parent, child1);
-todo_wine {
     ok(!IsChild(desktop, child2), "wrong parent/child %p/%p\n", desktop, child2);
-}
     ok(!IsChild(parent, child2), "wrong parent/child %p/%p\n", parent, child2);
     ok(!IsChild(child1, child2), "wrong parent/child %p/%p\n", child1, child2);
     ok(!IsChild(parent, child3), "wrong parent/child %p/%p\n", parent, child3);
     ok(IsChild(child2, child3), "wrong parent/child %p/%p\n", child2, child3);
     ok(!IsChild(parent, child4), "wrong parent/child %p/%p\n", parent, child4);
     ok(!IsChild(child3, child4), "wrong parent/child %p/%p\n", child3, child4);
-todo_wine {
     ok(!IsChild(desktop, child4), "wrong parent/child %p/%p\n", desktop, child4);
-}
 
     if (!is_win9x) /* Win9x doesn't survive this test */
     {

dlls/user32/win.c

@@ -2609,7 +2609,7 @@ BOOL WINAPI IsChild( HWND parent, HWND child )
     if (!list) return FALSE;
     parent = WIN_GetFullHandle( parent );
     for (i = 0; list[i]; i++) if (list[i] == parent) break;
-    ret = (list[i] != 0);
+    ret = list[i] && list[i+1];
     HeapFree( GetProcessHeap(), 0, list );
     return ret;
 }

dlls/winex11.drv/dce.c

@@ -391,7 +391,7 @@ void invalidate_dce( HWND hwnd, const RECT *rect )
 
             /* check if DCE window is within the z-order scope */
 
-            if (hwndScope == dce->hwnd || IsChild( hwndScope, dce->hwnd ))
+            if (hwndScope == dce->hwnd || hwndScope == GetDesktopWindow() || IsChild( hwndScope, dce->hwnd ))
             {
                 if (hwnd != dce->hwnd)
                 {