while(1){
	ControlSend,, {Tab}, Dungeon Defenders Eternity
	Sleep, 300000 ; 5min wait (time in miliseconds)
	}
	return

	;You can replace {Tab} by {Shift} or other key you like. (1, r, W, ..)
	;list of the special keys name: http://www.autohotkey.com/docs/commands/Send.htm