I recv() says that i am getting 0 bytes back into my program and WSAGetLastError() returns 0 what am i doing wrong ?

Don''t know. What does you code look like?

for sending :

return send(sock, szBuff, 256, 0); 

recv :

return recv(sock, szBuff, 256, 0); 

i am using TCP/IP

Well, that''s not much to go on, but from what you wrote, it''s safe to say that your recv succeeded with no errors and returned 0 bytes. Have you set up your socket to block until bytes have been received?

uhh.. from the docs:

>Return Values:
>
>If no error occurs, recv returns the number of bytes received. >If the connection has been gracefully closed, the return value >is zero. Otherwise, a value of SOCKET_ERROR is returned, and a >specific error code can be retrieved by calling WSAGetLastError.

Hm... is it the one that is trying to revc() or the one that is trying to send() ???

recv returns 0 on graceful disconnection.
If you use blocking sockets it will block until bytes have been received and then return the number of bytes received (which must be greater than 0 obviously).
If you use non-blocking and there is no data, it will return SOCKET_ERROR and the last error should be WSAEWOULDBLOCK (if i remember the spelling correctly).
Most likely your connection is being closed. Is it possible the other end of the connection is closing the connection before sending any data?