[Closed] DotNet getting screen info

ok found it , here is it

struct mcSCREENS_DATA --NEED a INSTANCE
(
	scr = (dotNetClass "System.Windows.Forms.Screen"),	
	fn count = (scr.AllScreens.count),
	fn name num:1 = (scr.AllScreens[num].DeviceName),
	fn size num:1 = 
	(
		if scr.AllScreens.count < num do return false
		[scr.AllScreens[num].Bounds.Width, scr.AllScreens[num].Bounds.Height]
	),
	fn fullSize = 
	(
		local size = [0, 0]
		for s in scr.AllScreens do size += [s.Bounds.Width, s.Bounds.Height]
		return size
	),
	fn active =
	(
		local p = dotnetObject "Drawing.Point" mouse.screenpos.x mouse.screenpos.y
		for i=1 to scr.AllScreens.count where scr.AllScreens[i] == (scr.FromPoint p) do return i
		--(scr.FromPoint p).DeviceName
	),
	fn pos num:1 = 
	(
		if scr.AllScreens.count < num do return false
		[scr.AllScreens[num].Bounds.x, scr.AllScreens[num].Bounds.y]
	)
 )
 
my_screens = mcSCREENS_DATA()
 
my_screens.count()
my_screens.name num:2
my_screens.size num:1
my_screens.size num:2
my_screens.fullSize()
my_screens.active()

Maybe a stupid question but what does the [] does envolving the last line on the functions of the struct? I’ve only used [] when calling array stuff.