If you want to use the Speex ACM codec in Netmeeting, you need to register the codec with Netmeeting. Microsoft offers an API to accomplish this task. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/netmeet/nm3 codec_1xk3.asp The function is called AddACMFormat in the IInstallAudioCodecs COM interface. It takes a fully initialized WAVEFORMATEX structure as well as an extra AUDCAP_INFO structure as arguments. This WAVEFORMATEX structure can be obtained by querying the ACM codec for its supported modes. If you are familiar with COM programming under Windows, this is a task that will not take very long to do (could be done in a single day). Just instantiate a Netmeeting COM object, query for the IInstallAudioCodecs interface and call into named function. Some code samples are in the Netmeeting SDK, available from Microsoft. I have used it before to programmatically access ILS servers. I could have spammed all ILS servers with useless records, if I had wanted to ;) It would be nice to have a utility (with GUI), allowing to add and remove any ACM codec into Netmeeting. Imagine using Fraunhofer's MP3 in there. ;) Christian --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'speex-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.