Call Accept dialog pop up in Chat application

That would make for a quite a long tutorial, but to give you an idea of some sorts:

1. Keep track of each user that connects so that you can contact them directly

2. Notify the server side from the sending client side that they want to contact somebody, passing in the receiver's unique ID (that you create)

3. Server side figures out which user that is and send them a notification

4. Keep the state of the request on the server and client sides so that you can control how many requests they get etc

5. Respond by the receiver to the server passing back their user ID. The server side code should then go over a hash table of sorts to find out who was trying to contact them (you also have the option of course of just passing around users' IDs so you just pass back the sender's ID too)

6. Get the server to find the sender and respond appropriately.

Check out some tutorials here that cover a lot of server side coding best practices:

http://www.fmsguru.com/tutorials.cfm?tab=fms

That kind of functionality is covered in our chat application product too, but it's not free unfortunately.

Anyways, hope that helps with your question. It's a big deal building that kind of functionality in but can definitely be done with a bit of coding.