Ok I have no idea what to do to receive a channel list using CSB, would anyone mind giving me a few ideas?
Of course by Channel List I mean when you click Channel up in the top left and it lists Blizzard Tech Support, Open Tech Support. I know it's probably pretty straight forward but I don't get it.

This may be possible using CSB's BuildPacket method, but I'm not sure how the return would arrive. (ie, how the data will be presented to you when it returns from the server, IF it is presented to you.)

Edit: Method, not function.

send 0xB with a dword for product

When connecting to battle.net, CSB requests and returns the channel list in the _ChannelList event. Should you request the list separately, it seems likely that it would also return in the _ChannelList event. ;)