Hi gishu, try to change project setting Character Set from Unicode Set to Multi-Byte character set. does that help? with best regards Jochen -- View this message in context: http://vtk.1045678.n5.nabble.com/Integrate-VTKDlg-with-MFC-App-tp5643463p5713626.html Sent from the VTK - Users mailing list archive at Nabble.com.