[jitsi-dev] Help please


Hey guys,
I have to do a work about Jitsi, and the work is to do a program in which I insert the XMPP account that I want to call, and when I press the "call button", opens directly Jitsi and call it.
Anybody does know how can I do it? Which parameters should I pass it? Or what should I modify?
Thank you very much if somebody can give me an idea..