Fullscreen???//

How do i make the game when i click on the run button go to full screen instead of a frigin window!?? I'm using the beta version but when i use the regular version i have no problem and it goes into full screen but I need beta version because of the terrain!!! how do I make it fullscreen????

- var video_screen = 1;

- alt+tab (for testing)

-command line: no -wnd tag

oh thank you the var video worked I was about to go crazy lol thanks soooo much!