A couple of years ago, I bought a Behringer X32 and set about writing a surface plugin for Sonar.  I have it set up as a 16 channel + 8 bus surface.  It still a work in progress, and I wouldn't trust it during tracking sessions, but I do use it as for mixing.   
 
I have downloaded the latest surface code from github, and want to upgrade my code to the latest ideas.  I have a few questions that fellow developers (and Noel) might be able to help with, but not sure if there is a better forum that this one.
 
Does anyone have any suggestions where I should be posting.
 
Neil

The best one I can think of is the DSP and Plug-in Development forum over at KVR.

soundman32
A couple of years ago, I bought a Behringer X32 and set about writing a surface plugin for Sonar.  I have it set up as a 16 channel + 8 bus surface.  It still a work in progress, and I wouldn't trust it during tracking sessions, but I do use it as for mixing.   
 
I have downloaded the latest surface code from github, and want to upgrade my code to the latest ideas.  I have a few questions that fellow developers (and Noel) might be able to help with, but not sure if there is a better forum that this one.
 
Does anyone have any suggestions where I should be posting.
 
Neil

If it's in connection with Sonar you could do worse than get in touch with user azslow3 here on the forum. He's developed a plugin for Sonar control surfaces.

Not sure whether you're aware that Cakewalk have made the surface control software open source. It's available at GitHub.com