I can't find in the manual how to change the resolution of the game to the same resolution of the operator system (like Windows XP or Vista). I want to change the resolution of the game on startup. How do I do this?

-EDIT
Also, I want to use PATH "dirname", but the Script Editor gives an error saying that it is an undeclared indentifier. Is PATH "dirname" C-script only, or also Lite-C?

Thanks in advance!