How to Merge C/C++ Compile in Visual Studio 2008?

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in the name of allah

hi everyone

i work on a project that contains the C and C++ Codes together.
the project source is in visual sutdio2008 and when i add the C++ files and codes side of C Files, the projects errors like below.
i need the both , please help me.

i don't #include <windows.h>
i even use

C++

#ifdef _windows_
#undef _windows_
#endif

C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\atlmfc\include\afxv_w32.h(20) : fatal error C1189: #error :  WINDOWS.H already included.  MFC apps must not #include <windows.h>

is it cause of #include <afxwin.h>?
i use the some codes and functions that need the afxwin.h.

the properties of project is : /MD use standard library
and i tried the /MT and shared dll library.

whats the problem?
thank you

Posted 4-Feb-15 21:09pm

Mahdi Nejadsahebi

Updated 4-Feb-15 21:48pm

Richard MacCutchan

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Richard MacCutchan 5-Feb-15 3:50am

Impossible to tell exactly, but somewhere in the #include tree you are getting windows.h repeated. Look at the source file that is being compiled when this message occurs and trace back from there.

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Frankie-C · Accepted Answer · 2015-02-04T23:55:00

Solution 1

Be sure that all afx inclusions precedes the other include.

Posted 4-Feb-15 23:55pm

Frankie-C