PdhEnumObjectItemsA

function PdhEnumObjectItemsA(

  szDataSource: LPCSTR;

  szMachineName: LPCSTR;

  szObjectName: LPCSTR;

  mszCounterList: LPSTR;

  var pcchCounterListLength: DWORD;

  mszInstanceList: LPSTR;

  var pcchInstanceListLength: DWORD;

  dwDetailLevel: DWORD;

  dwFlags: DWORD

):PDH_STATUS;