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diff --git a/accessibility/inc/extended/listboxaccessible.hxx b/accessibility/inc/extended/listboxaccessible.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 .
+ */
+
+#ifndef INCLUDED_ACCESSIBILITY_INC_EXTENDED_LISTBOXACCESSIBLE_HXX
+#define INCLUDED_ACCESSIBILITY_INC_EXTENDED_LISTBOXACCESSIBLE_HXX
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <tools/link.hxx>
+#include <vcl/vclptr.hxx>
+
+class SvTreeListBox;
+class VclSimpleEvent;
+class VclWindowEvent;
+
+namespace accessibility
+{
+
+    /** helper class which couples its life time to the life time of an
+        SvTreeListBox
+    */
+    class ListBoxAccessibleBase
+    {
+    private:
+        VclPtr<SvTreeListBox> m_pWindow;
+
+    protected:
+        inline SvTreeListBox*       getListBox() const
+        {
+            return  const_cast< ListBoxAccessibleBase* >( this )->m_pWindow;
+        }
+
+        inline  bool                    isAlive() const     { return nullptr != m_pWindow; }
+
+    public:
+        ListBoxAccessibleBase( SvTreeListBox& _rWindow );
+
+    protected:
+        virtual ~ListBoxAccessibleBase( );
+
+        // own overridables
+        /// will be called for any VclWindowEvent events broadcasted by our VCL window
+        void ProcessWindowEvent( const VclWindowEvent& _rVclWindowEvent );
+
+        /** will be called when our window broadcasts the VCLEVENT_OBJECT_DYING event
+
+            <p>Usually, you derive your class from both ListBoxAccessibleBase and XComponent,
+            and call XComponent::dispose here.</p>
+        */
+        virtual void SAL_CALL dispose() throw ( css::uno::RuntimeException, std::exception ) = 0;
+
+        /// to be called in the dispose method of your derived class
+        void disposing();
+
+    private:
+        DECL_LINK_TYPED( WindowEventListener, VclWindowEvent&, void );
+
+    private:
+        ListBoxAccessibleBase( const ListBoxAccessibleBase& ) = delete;
+        ListBoxAccessibleBase& operator=( const ListBoxAccessibleBase& ) = delete;
+    };
+
+
+}   // namespace accessibility
+
+
+#endif // INCLUDED_ACCESSIBILITY_INC_EXTENDED_LISTBOXACCESSIBLE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */