QueryPerformanceFrequency

Overview

Group

Quick Info

Windows NT
Yes
Win95
Yes
Win32s
No
Import Library
kernel32.lib
Header File
winbase.h
Unicode
No
Platform Notes
None

The QueryPerformanceFrequency function retrieves the frequency of the high-resolution performance counter, if one exists.

BOOL QueryPerformanceFrequency(

LARGE_INTEGER *lpFrequency	// address of current frequency
);

Parameters
lpFrequency

Points 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, this parameter can be to zero.

Return Values
If the installed hardware supports a high-resolution performance counter, the return value is nonzero.

If the installed hardware does not support a high-resolution performance counter, the return value is zero.