Hi, I changed a sample app so it takes paramters instead of using #define. What I'm confused about now is how I should concatenate strings; the following doesn't work: cfg.id = pj_str(sip_user.ptr "@" sip_domain.ptr); How could that string be concatenated? btw thanks for your reply on my last post, benny :-) It really works. -- Psssst! Schon vom neuen GMX MultiMessenger geh?rt? Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger