I followed the example on this link.
It worked pretty well - but it worked like a Chat Room.
I dont know how to just send and get message between just 2 clients.
Can someone give me some advices to do that?
Thank you for reading.
As far as I know you cant have only clients. You need to have both, a client and a server.
If you are trying to make a chat program with only 2 users, one of the users needs to act as a server and the other as the client. You only need to put a constraint on the server to allow only one client.