WSASend

int WSASend(
       SOCKET s,
       WSABUF *  lpBuffers,
       DWORD dwBufferCount,
       DWORD *  lpNumberOfBytesSent,
       DWORD dwFlags,
       OVERLAPPED *  lpOverlapped,
       void *  lpCompletionRoutine
   )

Send data on a socket using overlapped I/O.

Parameters

`s`	Socket descriptor.
`lpBuffers`	Array of WSABUF structures.
`dwBufferCount`	Number of WSABUF structures.
`lpNumberOfBytesSent`	Receives bytes transferred (if completed immediately).
`dwFlags`	Flags for the send operation.
`lpOverlapped`	Overlapped structure for async operation.
`lpCompletionRoutine`	Completion routine (usually null for IOCP).

Returns

0 on immediate success, SOCKET_ERROR on error or pending.