Ahh nice! But yea for sure you can control other programs There are a few options:
Personally, I’d recommend doing (2) because it means you don’t have to edit / recompile the Ubi Displays app each time you want to change the functionality - and the display PC can be separate from your main PC.
I actually included a sample display called “Control Switch.html” which should contain the basics of what you want already. It is used for start/stopping a video on another display. Replace Authority.call(...) with your websocket code and you should be good to go!