Abhishek To open a H.239 session you can call at any time. H323Connection::OpenExtendedVideoSession(sessionIdopened) To close you call H323Connection::CloseExtendedVideoSession(sessionIdtoClose) To set input and output devices override. H323EndPoint::OpenExtendedVideoChannel() set the same way as you would OpenVideoChannel. The simple program in the application directory in the CVS supports H.239. Simon -----Original Message----- From: h323plus-bounces@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com]On Behalf Of Abhishek Rohilla Sent: Thursday, January 03, 2008 4:58 PM To: h323plus@lists.packetizer.com Subject: [h323plus] How to Add Extended Video Capability for H.239 Hi Simon Thanks for ur earlier response. Plugins are working perfectly fine now. Can u give me some way into how to create H.239 extended video channel. I guess we have to add extended video capability into capability table first but I have not succeeded in that till now. How can we change the default video channel to extended video channel for transmission of data. Thanks