What we really need is a high-resolution GetTickCount(). As far as I know, this doesn't really exist.
If you're willing to use a hackish way to solve this (that would probably only work on some versions of Windows like XP), look here at ReactOS. Then try this code:
long long GetTickCount64()
{
return (long long)
((((unsigned long long)*(unsigned long int*)0x7FFE0000
* (unsigned long long)*(unsigned long int*)0x7FFE0004)
* (unsigned long long)10000) >> 0x18);
}
Tweaking it might give you what you need in some versions of Windows.
