_PERF_DATA_BLOCK

type _PERF_DATA_BLOCK = record

  Signature: array [0..3] of WCHAR;

  LittleEndian: DWORD;

  Version: DWORD;

  Revision: DWORD;

  TotalByteLength: DWORD;

  HeaderLength: DWORD;

  NumObjectTypes: DWORD;

  DefaultObject: LONG;

  SystemTime: SYSTEMTIME;

  PerfTime: LARGE_INTEGER;

  PerfFreq: LARGE_INTEGER;

  PerfTime100nSec: LARGE_INTEGER;

  SystemNameLength: DWORD;

  SystemNameOffset: DWORD;

end;