DsGetSpn

function DsGetSpn(

  ServiceType: DS_SPN_NAME_TYPE;

  ServiceClass: LPCTSTR;

  ServiceName: LPCTSTR;

  InstancePort: USHORT;

  cInstanceNames: USHORT;

  pInstanceNames: LPCTSTR;

  pInstancePorts: PUSHORT;

  var pcSpn: DWORD;

  var prpszSpn: LPTSTR

):DWORD;