PdhSetCounterScaleFactor function (pdh.h)

Sets the scale factor that is applied to the calculated value of the specified counter when you request the formatted counter value. If the PDH_FMT_NOSCALE flag is set, then this scale factor is ignored.


PDH_FUNCTION PdhSetCounterScaleFactor(
  [in] PDH_HCOUNTER hCounter,
  [in] LONG         lFactor


[in] hCounter

Handle of the counter to apply the scale factor to. The PdhAddCounter function returns this handle.

[in] lFactor

Power of ten by which to multiply the calculated value before returning it. The minimum value of this parameter is PDH_MIN_SCALE (–7), where the returned value is the actual value multiplied by 10⁷. The maximum value of this parameter is PDH_MAX_SCALE (+7), where the returned value is the actual value multiplied by 10⁺⁷. A value of zero will set the scale to one, so that the actual value is returned.

Return value

If the function succeeds, it returns ERROR_SUCCESS.

If the function fails, the return value is a system error code or a PDH error code. The following are possible values.

Return code Description
The scale value is out of range.
The counter handle is not valid.


Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header pdh.h
Library Pdh.lib
DLL Pdh.dll

See also