Retrieves the frequency of the high-resolution performance counter
#include <WinAPISys.au3>
_WinAPI_QueryPerformanceFrequency ( )
| Success: | The current performance-counter frequency, in counts per second. |
| Failure: | Sets the @error flag to non-zero, call _WinAPI_GetLastError() to get extended error information. |
Search QueryPerformanceFrequency in MSDN Library.