then I build pjlibraries - this info was in docs(about selection pjsua project as StartUp project). about your question( or right click then Project Only-> Build only PJSUA): NO, you should build ALL THE SOLUTION. according to your question - as I understand - you still don't have build PJlibrary. Am I right? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120619/c238f31b/attachment.html>