FILETIME to Unix Time (__time64_t or time_t)

__time64_t FileTimeToUnixTime(FILETIME & ft)
{
	ULARGE_INTEGER ull;
 
	ull.LowPart = ft.dwLowDateTime;
	ull.HighPart = ft.dwHighDateTime;
 
	return ull.QuadPart / 10000000ULL - 11644473600ULL;
}