Make window handles 32-bit before calling window procedure.

include/win.h

@@ -85,8 +85,7 @@ extern WND*   WIN_FindWndPtr( HWND hwnd );
 extern WND*   WIN_LockWndPtr(WND *wndPtr);
 extern void   WIN_ReleaseWndPtr(WND *wndPtr);
 extern void   WIN_UpdateWndPtr(WND **oldPtr,WND *newPtr);
-extern void   WIN_DumpWindow( HWND hwnd );
-extern void   WIN_WalkWindows( HWND hwnd, int indent );
+extern HWND WIN_GetFullHandle( HWND hwnd );
 extern void WIN_LinkWindow( HWND hwnd, HWND parent, HWND hwndInsertAfter );
 extern void WIN_UnlinkWindow( HWND hwnd );
 extern HWND WIN_FindWinToRepaint( HWND hwnd );

windows/win.c

@@ -147,6 +147,26 @@ static WND *free_window_handle( HWND hwnd )
 
 
 /***********************************************************************
+ *           WIN_GetFullHandle
+ *
+ * Get the full 32-bit window handle from a possibly truncated handle.
+ */
+HWND WIN_GetFullHandle( HWND hwnd )
+{
+    if (!HIWORD(hwnd))
+    {
+        SERVER_START_REQ( get_window_info )
+        {
+            req->handle = hwnd;
+            if (!SERVER_CALL_ERR()) hwnd = req->full_handle;
+        }
+        SERVER_END_REQ;
+    }
+    return hwnd;
+}
+
+
+/***********************************************************************
  *           WIN_FindWndPtr
  *
  * Return a pointer to the WND structure corresponding to a HWND.
@@ -294,10 +314,9 @@ void WIN_LinkWindow( HWND hwnd, HWND parent, HWND hwndInsertAfter )
         if (*ppWnd) *ppWnd = wndPtr->next;
     }
 
-    wndPtr->parent = parentPtr;
-
     if (parentPtr)
     {
+        wndPtr->parent = parentPtr;
         if ((hwndInsertAfter == HWND_TOP) || (hwndInsertAfter == HWND_BOTTOM))
         {
             ppWnd = &parentPtr->child;  /* Point to first sibling hwnd */
@@ -314,6 +333,7 @@ void WIN_LinkWindow( HWND hwnd, HWND parent, HWND hwndInsertAfter )
         wndPtr->next = *ppWnd;
         *ppWnd = wndPtr;
     }
+    else wndPtr->next = NULL;  /* unlinked */
 
  done:
     WIN_ReleaseWndPtr( parentPtr );
@@ -2155,11 +2175,10 @@ HWND WINAPI GetParent( HWND hwnd )
 HWND WINAPI GetAncestor( HWND hwnd, UINT type )
 {
     HWND ret;
-    WND *wndPtr, *parent;
+    WND *wndPtr;
 
     if (hwnd == GetDesktopWindow()) return 0;
     if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
-    parent = wndPtr->parent;
 
     switch(type)
     {
@@ -2173,7 +2192,7 @@ HWND WINAPI GetAncestor( HWND hwnd, UINT type )
     case GA_ROOTOWNER:
         while (wndPtr->parent->hwndSelf != GetDesktopWindow())
             WIN_UpdateWndPtr( &wndPtr, wndPtr->parent );
-        while (wndPtr->owner)
+        while (wndPtr && wndPtr->owner)
         {
             WND *ptr = WIN_FindWndPtr( wndPtr->owner );
             WIN_ReleaseWndPtr( wndPtr );
@@ -2181,7 +2200,7 @@ HWND WINAPI GetAncestor( HWND hwnd, UINT type )
         }
         break;
     }
-    ret = wndPtr->hwndSelf;
+    ret = wndPtr ? wndPtr->hwndSelf : 0;
     WIN_ReleaseWndPtr( wndPtr );
     return ret;
 }

windows/winproc.c

@@ -162,6 +162,7 @@ static LRESULT WINPROC_CallWndProc( WNDPROC proc, HWND hwnd, UINT msg,
     LRESULT retvalue;
     int iWndsLocks;
 
+    hwnd = WIN_GetFullHandle( hwnd );
     if (TRACE_ON(relay))
         DPRINTF( "%08lx:Call window proc %p (hwnd=%08x,msg=%s,wp=%08x,lp=%08lx)\n",
                  GetCurrentThreadId(), proc, hwnd, SPY_GetMsgName(msg), wParam, lParam );
@@ -516,28 +517,20 @@ WINDOWPROCTYPE WINPROC_GetProcType( HWINDOWPROC proc )
  *
  * Return TRUE if the lparam is a string
  */
-static BOOL WINPROC_TestCBForStr ( HWND hwnd )
+inline static BOOL WINPROC_TestCBForStr( HWND hwnd )
 {
-    BOOL retvalue;
-    WND * wnd = WIN_FindWndPtr(hwnd);
-    retvalue = ( !(LOWORD(wnd->dwStyle) & (CBS_OWNERDRAWFIXED | CBS_OWNERDRAWVARIABLE)) ||
-	      (LOWORD(wnd->dwStyle) & CBS_HASSTRINGS) );
-    WIN_ReleaseWndPtr(wnd);
-    return retvalue;
+    DWORD style = GetWindowLongA( hwnd, GWL_STYLE );
+    return (!(style & (CBS_OWNERDRAWFIXED | CBS_OWNERDRAWVARIABLE)) || (style & CBS_HASSTRINGS));
 }
 /**********************************************************************
  *	     WINPROC_TestLBForStr
  *
  * Return TRUE if the lparam is a string
  */
-static BOOL WINPROC_TestLBForStr ( HWND hwnd )
+inline static BOOL WINPROC_TestLBForStr( HWND hwnd )
 {
-    BOOL retvalue;
-    WND * wnd = WIN_FindWndPtr(hwnd); 
-    retvalue = ( !(LOWORD(wnd->dwStyle) & (LBS_OWNERDRAWFIXED | LBS_OWNERDRAWVARIABLE)) ||
-	    (LOWORD(wnd->dwStyle) & LBS_HASSTRINGS) );
-    WIN_ReleaseWndPtr(wnd);
-    return retvalue;
+    DWORD style = GetWindowLongA( hwnd, GWL_STYLE );
+    return (!(style & (LBS_OWNERDRAWFIXED | LBS_OWNERDRAWVARIABLE)) || (style & LBS_HASSTRINGS));
 
 }
 /**********************************************************************