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diff --git a/include/vcl/syschild.hxx b/include/vcl/syschild.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_VCL_SYSCHILD_HXX
+#define INCLUDED_VCL_SYSCHILD_HXX
+
+#include <vcl/dllapi.h>
+#include <vcl/window.hxx>
+
+struct SystemEnvData;
+struct SystemWindowData;
+
+class VCL_DLLPUBLIC SystemChildWindow : public vcl::Window
+{
+private:
+    using Window::ImplInit;
+    SAL_DLLPRIVATE void     ImplInitSysChild( vcl::Window* pParent, WinBits nStyle, SystemWindowData *pData, bool bShow = false );
+
+    // Copy assignment is forbidden and not implemented.
+                            SystemChildWindow (const SystemChildWindow &) = delete;
+                            SystemChildWindow & operator= (const SystemChildWindow &) = delete;
+
+public:
+    explicit                SystemChildWindow( vcl::Window* pParent, WinBits nStyle );
+                            // create a SystemChildWindow using the given SystemWindowData
+    explicit                SystemChildWindow( vcl::Window* pParent, WinBits nStyle, SystemWindowData *pData, bool bShow = true );
+    virtual                 ~SystemChildWindow() override;
+    virtual Size            GetOptimalSize() const override;
+    virtual void            dispose() override;
+
+    virtual const SystemEnvData* GetSystemData() const override;
+
+    //  per default systemchildwindows erase their background for better plugin support
+    //  however, this might not always be required
+    void                    EnableEraseBackground( bool bEnable );
+    void                    SetForwardKey( bool bEnable );
+    //To avoid annoying flashing under X entering and leaving slides with opengl effects set the leaving
+    //bitmap as the background pixmap of the opengl child window and the entering bitmap as the background
+    //pixmap of the non-opengl parent window. If any expose events occur around the start and end of
+    //the transition then those windows are default filled by X with the desired start/end image so there's
+    //no visible flash
+    void                    SetLeaveEnterBackgrounds(const css::uno::Sequence<css::uno::Any>& rLeaveArgs, const css::uno::Sequence<css::uno::Any>& rEnterArgs);
+    // return the platform specific handle/id of this window;
+    sal_IntPtr              GetParentWindowHandle() const;
+
+    void*                   CreateGStreamerSink();
+};
+
+#endif // INCLUDED_VCL_SYSCHILD_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */