最简单的mfc程序

#include <afxwin.h>
struct CMain: CWinApp
{
BOOL InitInstance()
{
::AfxMessageBox("Hello world!");
return FALSE;
}
} main;
#pragma comment(linker, "/SubSystem:Windows /Entry:WinMainCRTStartup")
#ifndef _DEBUG
#pragma comment(lib, "NAfxCw.lib")
#pragma comment(lib, "LibCMt.lib")
#pragma comment(linker, "/NoDefaultLib:LibC.lib")
#else
#pragma comment(lib, "NAfxCwD.lib")
#pragma comment(lib, "LibCMtD.lib")
#pragma comment(linker, "/NoDefaultLib:LibCD.lib")
#endif