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diff --git a/include/vcl/wrkwin.hxx b/include/vcl/wrkwin.hxx
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+++ b/include/vcl/wrkwin.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_WRKWIN_HXX
+#define INCLUDED_VCL_WRKWIN_HXX
+
+#include <vcl/dllapi.h>
+#include <vcl/syswin.hxx>
+#include <o3tl/typed_flags_set.hxx>
+
+namespace com::sun::star::uno { class Any; }
+struct SystemParentData;
+
+
+// Presentation Flags
+enum class PresentationFlags
+{
+    NONE           = 0x0000,
+    HideAllApps    = 0x0001,
+};
+
+namespace o3tl
+{
+    template<> struct typed_flags<PresentationFlags> : is_typed_flags<PresentationFlags, 0x0001> {};
+}
+
+
+class VCL_DLLPUBLIC WorkWindow : public SystemWindow
+{
+private:
+    PresentationFlags mnPresentationFlags;
+    bool              mbPresentationMode:1,
+                      mbPresentationVisible:1,
+                      mbPresentationFull:1,
+                      mbFullScreenMode:1;
+
+    SAL_DLLPRIVATE void ImplInitWorkWindowData();
+    SAL_DLLPRIVATE void ImplInit( vcl::Window* pParent, WinBits nStyle, const css::uno::Any& aSystemWorkWindowToken );
+
+private:
+    WorkWindow( const WorkWindow& rWin ) = delete;
+    WorkWindow&  operator =( const WorkWindow& rWin ) = delete;
+
+protected:
+    explicit        WorkWindow( WindowType nType );
+    SAL_DLLPRIVATE void ImplInit( vcl::Window* pParent, WinBits nStyle, SystemParentData* pSystemParentData = nullptr );
+    SAL_DLLPRIVATE void ImplSetFrameState( WindowStateState aFrameState );
+
+public:
+    explicit        WorkWindow( vcl::Window* pParent, WinBits nStyle = WB_STDWORK );
+    explicit        WorkWindow( vcl::Window* pParent, const css::uno::Any& aSystemWorkWindowToken, WinBits nStyle = WB_STDWORK );
+    explicit        WorkWindow( SystemParentData* pParent ); // Not in the REMOTE-Version
+    virtual         ~WorkWindow() override;
+    virtual void    dispose() override;
+
+    virtual bool    Close() override;
+
+    void            ShowFullScreenMode( bool bFullScreenMode,
+                                        sal_Int32 nDisplayScreen );
+    /**
+     @overload void ShowFullScreenMode(bool bFullScreenMode, sal_Int32 nDisplayScreen)
+    */
+    void            ShowFullScreenMode( bool bFullScreenMode );
+    bool            IsFullScreenMode() const { return mbFullScreenMode; }
+
+    void            StartPresentationMode( bool   bPresentation,
+                                           PresentationFlags nFlags,
+                                           sal_Int32  nDisplayScreen );
+    /**
+     @overload void StartPresentationMode( PresentationFlags nFlags, sal_uInt32 nDisplayScreen)
+    */
+    void            StartPresentationMode( PresentationFlags nFlags );
+    bool            IsPresentationMode() const { return mbPresentationMode; }
+
+    bool            IsMinimized() const;
+
+    void            SetPluginParent( SystemParentData* pParent );
+
+    void            Minimize();
+    void            Restore();
+
+    void            Maximize( bool bMaximize = true );
+    bool            IsMaximized() const;
+};
+
+#endif // INCLUDED_VCL_WRKWIN_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */