Trimming Your Include Lists

Trim the list of #include directives at the top of your migrated files and replace them with an #include directive for STDAFX.H. Guidelines:

• stdafx.h causes all of the header files needed by MFC to be included. These include AFXWIN.H (MFC Windows elements), AFX.H (non-Windows elements of MFC), AFXRES.H (MFC resource management), AFXCOLL.H (MFC collection classes), and others.
• Among the files included by stdafx.h is windows.h. MFC applications must not themselves include WINDOWS.H.

For SHOWDIB, trimming the lists involves replacing all #includes of windows.h with:

#include <stdafx.h>

For other applications, you may need to more closely examine what STDAFX.H includes to see if it affects other includes in your application.