Could you tell me, or point me in the right direction

, as to how to get the member's username into the url so it can be passed to the chat program? If I could set-up such a method, the person programming my chat program would be able to make it so the vBulletin Username is automatically accepted as the value of the "chat handle". Would be nice to restrict access to chat to those with an open vBulletin session, which I assume would stop people from forging the url and calling the chat program to assume someone else's identity. No? Any help would be appreciated.