In Microsoft visual studio 2013 Multi Byte character set(MBCS) support for MFC application has been deprecated.Earlier versions supports both MBCS and Unicode.Nowadays people prefers Unicode over MBCS , this trend motivated Microsoft to take this decision.A deprecated warning will be shown if we set project setting as MBCS.This warning can be eliminated by adding the NO_WARN_MBCS_MFC_DEPRECATION preprocessor definition to your project configuration.Go to Configuration Settings->C/C++->PreProcessor->Pre Processor Definitions and add NO_WARN_MBCS_MFC_DEPRECATION for this.