This method enables a control to notify its sink when drawing takes place.
HRESULT HandleDraw( IDispatch *pdispControl, OLE_HANDLE hDC );
NOERROR indicates that the sink handled the message. S_FALSE indicates that the sink did not handle the message. If an error occurs, the appropriate HRESULT value is returned.
A control invokes this method when its own IASControl::Draw method is invoked.