WSASend

function WSASend(

  const S: TSocket;

  const Buffers: PWSABuf;

  const BufferCount: Word32;

  var NumberOfBytesSent: Word32;

  const Flags: Word32;

  const Overlapped: PWSAOverlapped;

  const CompletionRoutine: TWSAOverlappedCompletionRoutine

):Integer;