EngQueryPerformanceCounter function (winddi.h)
The EngQueryPerformanceCounter function queries the performance counter.
Syntax
ENGAPI VOID EngQueryPerformanceCounter(
[out] LONGLONG *pPerformanceCount
);
Parameters
[out] pPerformanceCount
Pointer to a location that receives the performance counter value, in hertz.
Return value
None
Remarks
EngQueryPerformanceCounter always returns a 64-bit integer that represents the number of ticks per second. The count begins accumulating when the system is booted.
A driver should call this routine sparingly. Frequent calls to EngQueryPerformanceCounter can degrade the I/O performance for the calling driver and for the system as a whole.
Requirements
| Minimum supported client | Available in Windows 2000 and later versions of the Windows operating systems. |
| Target Platform | Universal |
| Header | winddi.h (include Winddi.h) |
| Library | Win32k.lib |
| DLL | Win32k.sys |