关于VC预定义常量_WIN32，WIN32，_WIN64等预定义宏的介绍（整理、转载）

#include

#include

typedef BOOL ( WINAPI * LPFN_ISWOW64PROCESS ) ( HANDLE , PBOOL );

LPFN_ISWOW64PROCESS fnIsWow64Process = NULL ;

BOOL Isx64Application () {

    return ( sizeof ( LPFN_ISWOW64PROCESS ) == 8 )? TRUE : FALSE ;

}

BOOL IsWow64 () {

    BOOL bIsWow64 = FALSE ;

    if (! fnIsWow64Process )

        fnIsWow64Process = ( LPFN_ISWOW64PROCESS ) GetProcAddress ( GetModuleHandle ( TEXT ( "kernel32" )), "IsWow64Process" );

    if ( fnIsWow64Process )

        if (! fnIsWow64Process ( GetCurrentProcess (), & bIsWow64 ))

            return FALSE ;

    return bIsWow64 ;

}

int main ( void ) {

    if ( Isx64Application ())

        _tprintf ( TEXT ( "The application is a x64 program.\n" ));

    else {

        if (! IsWow64 ())

            _tprintf ( TEXT ( "The application is running under Windows x86.\n" ));

        else

            _tprintf ( TEXT ( "The application is a x86 program running under Windows x64.\n" ));

    }

    return 0 ;

}