M.Caggiano wrote:

> Thank's for your answer.
> This is the c code:
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
> #include <winsock.h>
> #include <windows.h>

And these few lines are enough to see that what you're having is not really
a C problem but (possibly) a Windows API problem, and is therefore off-topic
in this newsgroup.

Go to a newsgroup concerned with Windows networking programming, where your
question is on-topic. We can't realy you here.

robert