--- a/uiacceltk/hitchcock/coretoolkit/inc/huicanvaswshwgc.h	Fri Mar 12 15:47:04 2010 +0200
+++ b/uiacceltk/hitchcock/coretoolkit/inc/huicanvaswshwgc.h	Mon Mar 15 12:43:37 2010 +0200
@@ -140,6 +140,8 @@
     virtual TInt EnableRenderbuffer(TBool aEnable = ETrue);    
     virtual THuiCanvasWsGcType Type() const;
 
+    virtual void ClearCapturingBufferArea(const TRect& aRect);
+
     void BeginDrawL(TRect aDisplayRect,const CHuiCanvasVisual& aUser, TBool aIsCachePrepared, const TRegion& aUpdateRegion);
     void EndDrawL(const TRegion& aUpdateRegion, TBool aUpdateDisplay);
     void BeginScanL(TRect aDisplayRect,const CHuiCanvasVisual& aUser, TBool aIsCachePrepared, const TRegion& aUpdateRegion);