>>Or add QueryPerformace-Routines into the fray...
>
>Can you tell me more about it?

High-Resolution Timer routines. Usually used in combination woth QueryPerformanceFrecency to arrive at comparable time slices. Depending on your needs you can use either QueryPerformanceCounter as a raw value or measure time in small slices, build an index together with a date() or datetime() and a flag for "rollover happened today"... look it up in WinAPI