Hi benny, ? How can I set the value of cfg.cb.on_reg_state and other callback? ? This is what I did ? cfg.cb.on_reg_state = &on_reg_state; ? i declare on_reg_state as function of a class -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090112/de874fb0/attachment.html>