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diff --git a/vcl/source/window/menuwindow.hxx b/vcl/source/window/menuwindow.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/types.h>
+#include <vcl/event.hxx>
+
+class HelpEvent;
+class Image;
+class Menu;
+class MenuBar;
+namespace tools { class Rectangle; }
+namespace vcl { class Window; }
+
+/** Common ancestor for MenuFloatingWindow and MenuBarWindow.
+
+The menu can be a floating window, or a menu bar.  Even though this has
+'Window' in the name, it is not derived from the VCL's Window class, as the
+MenuFloatingWindow's or MenuBarWindow's already are VCL Windows.
+
+TODO: move here stuff that was a mentioned previously when there was no
+common class for MenuFloatingWindow and MenuBarWindow:
+
+// a basic class for both (due to pActivePopup, Timer,...) would be nice,
+// but a container class should have been created then, as they
+// would be derived from different windows
+// In most functions we would have to create exceptions for
+// menubar, popupmenu, hence we made two classes
+
+*/
+class MenuWindow
+{
+protected:
+    /// Show the appropriate help tooltip.
+    static bool ImplHandleHelpEvent(vcl::Window* pMenuWindow, Menu const * pMenu, sal_uInt16 nHighlightedItem,
+            const HelpEvent& rHEvt, const tools::Rectangle &rHighlightRect);
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */