LookupAccountSidW

function LookupAccountSidW(

  lpSystemName: LPCWSTR;

  Sid: PSid;

  Name: LPWSTR;

  var cchName: DWORD;

  ReferencedDomainName: LPWSTR;

  var cchReferencedDomainName: DWORD;

  var peUse: SID_NAME_USE

):BOOL;