When I turned on the IPV6 support option in PJSIP, the compiler complained about a missing header file: tpipv6.h It seems that on windows, PJSIP depends on external libraries to support IPV6 and these libraries need to be installed. So what exactly does PJSIP depends on and where I can find it? I make some study but can not find anything related about this missing header file. -- look to the things around you,the immediate world around you, if you are alive,it will mean something to you ??Paul Strand -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20091105/7da23660/attachment.html>