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diff --git a/src/Authoring/Studio/_Win/UI/MemoryDC.h b/src/Authoring/Studio/_Win/UI/MemoryDC.h
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+/****************************************************************************
+**
+** Copyright (C) 2002 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef INCLUDED_MEMORY_DC_H
+#define INCLUDED_MEMORY_DC_H
+
+#pragma once
+
+//==============================================================================
+//	Includes
+//==============================================================================
+
+//==============================================================================
+/**
+ *	CMemoryDC: Subclassed CDC for drawing offscreen
+ *
+ *	This is a subclassed CDC so we can control drawing into a DC with offscreen
+ *	buffers to prevent flickering.
+  */
+//==============================================================================
+
+class CMemoryDC : public CDC
+{
+public:
+    //==========================================================================
+    //	Fields
+    //==========================================================================
+
+protected:
+    BOOL m_ValidFlag; // TRUE if we can successfully release/copy the offscreen image to the screen
+    CRect m_SrcRect; // Bounding rectangle for drawing
+    CBitmap m_MemBmp; // Offscreen bitmap image
+    CBitmap *m_OldBmp; // Previous bitmap in the offscreen DC
+    CDC *m_SrcDC; // Source device context for final blit
+
+    //==========================================================================
+    //	Methods
+    //==========================================================================
+
+public:
+    void SetRect(CRect inRect);
+
+    // Construction
+
+    CMemoryDC();
+    virtual ~CMemoryDC();
+
+    // Access
+
+    CPoint ConvertPoint(CPoint inDrawPoint);
+    CRect ConvertRect(CRect inDrawRect);
+    long ConvertXPos(long inXValue);
+    long ConvertYPos(long inYValue);
+    void CopySourceImage();
+    void Create(CDC *inDC, CRect inSrcRect);
+
+    void Release(BOOL inCopyToSourceFlag = TRUE);
+};
+
+/////////////////////////////////////////////////////////////////////////////
+
+//{{AFX_INSERT_LOCATION}}
+// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
+
+#endif // INCLUDED_MEMORY_DC_H