How can i add tooltip in my image file (*.BMP).I meant whenever my mouse cursor comes to the image file ,a tooltip should be displayed.Below Code: le.Format("DADC\nName:%s latitude: %d",objFlightParam.m_strEntId,fLat,); m_objToolTipCtrl.AddTool(this,le,0,IDB_BITMAP5); IDB_BITMAP5 is ID of the bitmap . It is showing a debug assertion error. Is there any other way