How does the VexV5 brain choose while files are run first

I was looking between my PROS and VexVs projects and some public GitHub projects and it made me wonder how the OS/Brain figures out while file to run first? I’m a bit of a novice programmer but all my experience so far tells me it has to call for a specific file somewhere to start like how a .exe normal traces back to a main.cpp or but between even just PROS programs i don’t see a clear starting point

If you’re looking for the main function, that is somewhere in the pros code. Pros will automatically run the functions in the default pros project for you when the competition control tells it to. If you are not using competition control it will run the initialize function then opcontrol