I have made my own library that uses MFC stuff like CString and CTimeSpan. I want to link this library to some other application. I have an include file that describes the interfaces that the application can use in the library. Must this other application be MFC enabled, or can I use the library with a non-MFC program? If MFC is not enabled, CString and CTimeSpan is not recognized. Is there some MFC include file that I can use so that it recognizes CString and CTimeSpan ?