private void _3DRenderWindow_Loaded(object sender, RoutedEventArgs e)
        {
            m_WndHandle = new WindowInteropHelper(this).Handle;

            m_3DInterface.CreateEnginWnd(m_WndHandle.ToInt32());
            m_3DInterface.SetCmdMsgCallback(new CSharpCallback(m_pMainWnd.On3DModuleMsg));
        }