WSAIoctl

function WSAIoctl(

  const S: TSocket;

  const IoControlCode: Word32;

  const InBuffer: Pointer;

  const InBufferSize: Word32;

  const OutBuffer: Pointer;

  const OutBufferSize: Word32;

  var BytesReturned: Word32;

  const Overlapped: PWSAOverlapped;

  const CompletionRoutine: TWSAOverlappedCompletionRoutine

):Integer;