Add a SetDoubleBuffered method for wxMSW (XP+)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53930 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/window.h

@@ -442,7 +442,9 @@ public:
 
     // check if a native double-buffering applies for this window
     virtual bool IsDoubleBuffered() const;
-
+    
+    void SetDoubleBuffered(bool on);
+    
     // synthesize a wxEVT_LEAVE_WINDOW event and set m_mouseInWindow to false
     void GenerateMouseLeave();