public static extern PdhStatus PdhGetFormattedCounterArray( PdhCounterHandle phCounter, PdhFormat dwFormat, ref UInt32 dwBufferSize, out UInt32 dwBufferCount, IntPtr itemBuffer);
public static extern UInt32 PdhGetFormattedCounterValue( PdhCounterHandle phCounter, PdhFormat dwFormat, IntPtr lpdwType, out PDH_FMT_COUNTERVALUE pValue);
public static extern PdhStatus PdhGetFormattedCounterValue( PdhCounterHandle phCounter, PdhFormat dwFormat, ref uint lpdwType, ref PDH_FMT_COUNTERVALUE pValue);