c++ 判断是64还是32位系统

BOOL WINAPI IsWow64Process(
__in HANDLE hProcess,
__out PBOOL Wow64Process
);

#include <windows.h>
#include <tchar.h>
typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
LPFN_ISWOW64PROCESS fnIsWow64Process;
BOOL IsWow64()
{
BOOL bIsWow64 = FALSE;
//IsWow64Process is not available on all supported versions of Windows.
//Use GetModuleHandle to get a handle to the DLL that contains the function
//and GetProcAddress to get a pointer to the function if available.
fnIsWow64Process = (LPFN_ISWOW64PROCESS) GetProcAddress(
GetModuleHandle(TEXT("kernel32")),"IsWow64Process");
if(NULL != fnIsWow64Process)
{
if (!fnIsWow64Process(GetCurrentProcess(),&bIsWow64))
{
//handle error
}
}
return bIsWow64;
}
int main( void )
{
if(IsWow64())
_tprintf(TEXT("The process is running under WOW64.\n"));
else
_tprintf(TEXT("The process is not running under WOW64.\n"));
return 0;
}