The Korg Manual says to look up the codes in your software reference or support. No luck so far.
There is an editor with the NanoKontrol that allows you to set parameters for each control. The default settings have no effect on PT (yes, the midi input is set). There are prefab scripts for the "big operators" (e.g., Cubase, Ableton, ProTools, etc.). Still nothing for PT. I'm messaging Korg support with a request.
Any help/ guesses still welcome.