private static extern long PdhSetQueryTimeRange(PdhSafeQueryHandle hQuery, ref PDH_TIME_INFO pInfo);
private static extern long PdhOpenLog(string szLogFileName, int dwAccessFlags, ref PdhLogFileType lpdwLogType, PdhSafeQueryHandle hQuery, long dwMaxSize, string szUserCaption, out PdhSafeLogHandle phLog);
private static extern long PdhOpenQueryH(PdhSafeDataSourceHandle hDataSource, IntPtr dwUserData, out PdhSafeQueryHandle phQuery);
private static extern long PdhCollectQueryData(PdhSafeQueryHandle queryHandle);
private static extern long PdhCollectQueryDataWithTime(PdhSafeQueryHandle queryHandle, ref long pllTimeStamp);
private static extern long PdhAddCounter(PdhSafeQueryHandle queryHandle, string counterPath, IntPtr userData, out IntPtr counterHandle);
private static extern long PdhAddRelogCounter(PdhSafeQueryHandle queryHandle, string counterPath, long counterType, long counterDefaultScale, ulong timeBase, out IntPtr counterHandle);
private static extern uint PdhAddRelogCounter(PdhSafeQueryHandle queryHandle, string counterPath,
UInt32 counterType, UInt32 counterDefaultScale,
UInt64 timeBase, out IntPtr counterHandle);
private static extern uint PdhCollectQueryDataWithTime(PdhSafeQueryHandle queryHandle, ref Int64 pllTimeStamp);
private static extern long PdhOpenQueryH(PdhSafeDataSourceHandle hDataSource, IntPtr dwUserData, out PdhSafeQueryHandle phQuery);
private static extern long PdhSetQueryTimeRange(PdhSafeQueryHandle hQuery, ref PDH_TIME_INFO pInfo);
private static extern long PdhOpenLog(string szLogFileName, int dwAccessFlags, ref PdhLogFileType lpdwLogType, PdhSafeQueryHandle hQuery, long dwMaxSize, string szUserCaption, out PdhSafeLogHandle phLog);
private static extern long PdhCollectQueryDataWithTime(PdhSafeQueryHandle queryHandle, ref long pllTimeStamp);
private static extern long PdhCollectQueryData(PdhSafeQueryHandle queryHandle);
private static extern long PdhAddRelogCounter(PdhSafeQueryHandle queryHandle, string counterPath, long counterType, long counterDefaultScale, ulong timeBase, out IntPtr counterHandle);
private static extern long PdhAddCounter(PdhSafeQueryHandle queryHandle, string counterPath, IntPtr userData, out IntPtr counterHandle);