You can run a lot of commands in your batch file, including setting up your dosbox or other program to use a certain directory as the main directory, set the screen size, run the application, and a host of other things. Think of using it as a short cut to do one click instead of many clicks in the same order or typing many commands in the same order. As an example, if you want to play a certain game in dosbox, it will use that directory, set any parameters needed and maximize the screen exactly the same way every time. Excellent to do for the semi computer literate or young child.
Seek peace but keep your gun handy.
I'm not a complete idiot, some parts are missing!
“Illegitemus non carborundum est (“Don’t let the bastards grind you down”).”
― Julia Child