Doktor Avalanche
Yup TouchDAW is MIDI based, wrong egg for the OP I suspect.
I still recommend it.
OK now I understand what you mean.
I spent more time reading the TouchDAW documentation, and of course you are right TouchDAW is not an OSC product, although on the surface it resembles my OSC Commander. I think I was also confused during my late night searches because there is also a (unrelated) product called TouchOSC.
Evidently to use TouchDAW, you install midi over lan type drivers in Windows called RTPmidi. Then TouchDAW communicates with the RTPmidi to emulate a Mackie Control in Sonar Preferences/ MIDI / Control Surface.
Direct support for a Sonar version is mentioned in the documentation of TouchDAW. So you end up with a tablet that emulates Mackie Control via wifi to MIDI bridge to Sonar. Actually the tablet is also possible to connect by USB cable or Bluetooth besides Wifi.
Now that I understand a little better, OSC has not become so popular with DAWs. Reaper and Digital Performer support OSC, but Cubase and Sonar do not.
There are several internet articles about using OSC on DAWs using a MIDI to Wifi bridge and Mackie Control emulation.
I think I will lay low and see what happens as far as touchscreen control of Sonar. At this point using the mouse seems to do the job even if it is not so much fun. I remember so many lost hours the last few times I tried to control Sonar with midi faders. Lots of Sonar users have been successful but not me.
I still think it would be a win / win if Cakewalk offered a nice tightly integrated tablet controller solution. I would pay them a license fee for it.
Thanks Doktor for making me aware of all of this.