QueryPerformanceFrequency info Overview Group

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.

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.

LARGE_INTEGER *lpFrequency	// address of current frequency
);