Re: Did WSASend always returned SOCKET_ERROR and error code is WSA_IO_PENDING .. ??

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That usual but not always behavior.
From MSDN :

Overlapped Socket I/O

If an overlapped operation completes immediately, WSASend returns a value of
zero and the lpNumberOfBytesSent parameter is updated with the number of
bytes sent. If the overlapped operation is successfully initiated and will
complete later, WSASend returns SOCKET_ERROR and indicates error code
WSA_IO_PENDING.

HTH
Arkady

"madmanahong" <madmanahong@xxxxxxx> wrote in message
news:1157517005.292964.292540@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Did WSASend always returned SOCKET_ERROR and error code is
WSA_IO_PENDING when I set overlapped..

I used IOCP, through observed, I Find WSASend always return
SOCKET_ERROR, and error code is WSA_IO_PENDING. Is right of my
observed?

Does WSASend can return zero when I set overlapped( example: IOCP )?



.

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