Gecko-MFC: #error WINDOWS.H already included. MFC apps must not #include

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Hi all
I am developing an Plugin for Mozilla Firefox, I use Visual C++ 2008 and Gecko that reference from:

https://developer.mozilla.org/en/Compiling The npruntime Sample Plugin in Visual Studio[^]
I want to use some function of MFC as: CArray, CString,.. then i must include some header of it and complile, ie. #include "afxtempl.h" , but i have an error as following:
#error WINDOWS.H already included. MFC apps must not #include <windows.h>
please help me
Thanks

Posted 11-Dec-11 22:34pm

tuan08

Updated 11-Dec-11 23:07pm

Richard MacCutchan

v3

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LaxmikantYadav · Answer 1 · 2011-12-11T23:16:00

Solution 1

This problem occurs due to nested or mutiple time inclusion of same header file. To avoid this use following micro in all source code file.

C#

#if !defined(MYCLASS_H)
#define MYCLASS_H

// TODO

#enfif

Posted 11-Dec-11 23:16pm

LaxmikantYadav

Comments

chaiein 28-Feb-12 5:00am

where should this be included? even i have this problem.

LaxmikantYadav 3-Mar-12 4:35am

In Header File.