how to resolve this problem : WINDOWS.H already included. MFC apps must not #include

afxv_w32.h(14) : fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h>

我的win32 DLL里的一个CPP
#include "stdafx.h"
#include <stdio.h>
#include <winuser.h>
#include <afxwin.h>

BOOL IsWindowsNt()
{
AfxMessageBox("unsupported operation system",MB_ICONSTOP,0);
}
我已经把stdafx.h里面包含#include <windows.h>的内容删除了
还是出现那个错误

7 个解决方案

#1

帮帮忙

#2

#include <winuser.h>
#include <afxwin.h>

这两行要删掉

#3

如果只是Win32 SDK写的，不需要用到MFC，都删掉，只需要一个#include <windows.h>.
MFC的许多头文件都包含了#include <windows.h>，所以有重复。

#4

在最顶端加上：
#pragma

#5

我是这样创建工程的File->new->Win32 Dynamic Library->A simple project.
#include "stdafx.h"

BOOL APIENTRY DllMain( HANDLE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
)
{
AfxMessageBox("kjfjksf","fsjfkj",MB_OK); // <----I should include <afxwin.h>
    return TRUE;
}

#6

#include <winuser.h>
#include <afxwin.h>
????

如果是MFC的程序就只包含后者，如果不是就不应该包含afxwin.h

#7

using MessageBox instead of AfxMessageBox,
resolved by myself.

#1

帮帮忙

#2