QueryPerformanceFrequency
A version of this page is also available for
4/8/2010
This function retrieves the frequency of the high-resolution performance counter if one is provided by the OEM.
Syntax
BOOL QueryPerformanceFrequency(
LARGE_INTEGER* lpFrequency
);
Parameters
lpFrequency
[out] Pointer to a variable that the function sets, in counts per second, to the current performance-counter frequency.If the installed hardware does not support a high-resolution performance counter, the value passed back through this pointer can be zero.
Return Value
TRUE indicates that a performance frequency value was successfully filled in. FALSE indicates failure.
Remarks
If the hardware does not support a high frequency counter, QueryPerformanceFrequency will return 1000 because the API defaults to a milliseconds GetTickCount implementation.
Requirements
| Header | winbase.h |
| Library | coredll.lib |
| Windows Embedded CE | Windows CE 2.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
See Also
Reference
Time Functions
QueryPerformanceCounter