em using three status ,sending,send and receive, if user is login and then send message then sending status change to send if not login then it remains in sending mode, when user on the recieving end receive the message a dummy message is send from recever to sender on the bases of that message i change status to receive,yes it shows in chat windows, works in background.
I find from somewhere we do it with stream as well but i have forget that solution.
