Thanks alot for all the comments, but not exactly what I'm looking for.
As said in my first post, I don't want the fullscreen to be default, only for this one .bat file.
Can I do that?
The mode command I've also tried, but again, in just resizes the windows, doesn't make it fullscreen.
Is there a command which starts a process/batch file in fullscreen?
Or someway I can start the shortcut it self, because I can make the one batch I need to run in fullscreen through a shortcut.