Changing the font.

I can't seem to figure this out. I've read up on this a bit on my own but I can't get it to work. What I want to do is change the font to Comic Sans, and remove the option to change it to anything else. I already figured out how to remove the option to change the font, but now the game defaults to the basic Arial font or whatever it is. Could someone help me out with this? :P

Go to SpriteWindow and do this change:
(first line)

Traubiii~