判断系统是32位还是64位

//判断系统是32位还是64位
//***********************************************************************************
typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);

BOOL IsWow64()
{
	LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(
		GetModuleHandle(_T("kernel32")),
		"IsWow64Process"
		);
	BOOL           bIsWow64 = FALSE;

	if (NULL != fnIsWow64Process)
	{
		if (!fnIsWow64Process(GetCurrentProcess(),&bIsWow64))
		{
			// Error handle
			return FALSE;
		}
	}
	return bIsWow64;
}

BOOL Is64BitWindows()
{
#if defined(_WIN64)

	return TRUE; // 64-bit programs run only on Win64

#else // _WIN32

	// 32-bit programs run on both 32-bit and 64-bit Windows
	// so must sniff
	return IsWow64();

#endif

}