QueryPerformanceFrequency function

Retrieves the frequency of the high-resolution performance counter, if one exists. The frequency cannot change while the system is running.

Syntax

BOOL WINAPI QueryPerformanceFrequency(
  _Out_  LARGE_INTEGER *lpFrequency
);

Parameters

lpFrequency [out]

Type: LARGE_INTEGER*

A pointer to a variable that receives the current performance-counter frequency, in counts per second. If the installed hardware does not support a high-resolution performance counter, this parameter can be zero.

Return value

Type:

Type: BOOL

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

If the function fails, the return value is zero. To get extended error information, call GetLastError. For example, if the installed hardware does not support a high-resolution performance counter, the function fails.

Remarks

Windows Phone 8: This API is supported.

Requirements

See also

Reference

QueryPerformanceCounter

Conceptual

Timers

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Build date: 10/26/2012