Well, the first thing is: how does Mixxx see it? If it shows up as a keyboard, then all you have to do is edit the standard.kbd.cfg file to map keys to functions. More info on this is in the manual
. The complete list of controls is on the wiki
. Once you open the keyboard mapping file, it's straightforward. No scripting is needed.
Mixxx Developer - Controller Specialist
Mixxx Windows package maintainer