The code below is from Autoit Help.
Please copy, run and try it you will see the way to build the GUI of your demo.
Its very simple and easy let believe that.
#include <GUIConstantsEx.au3>
Opt('MustDeclareVars', 1)
Example()
Func Example()
Local $MESSAGE = "The following buttons have been clicked"
Local $add, $clear, $mylist, $close, $msg
GUICreate("My GUI list") ; will create a dialog box that when displayed is centered
$add = GUICtrlCreateButton("Add", 64, 32, 75, 25)
$clear = GUICtrlCreateButton("Clear", 64, 72, 75, 25)
$mylist = GUICtrlCreateList("buttons that have been clicked", 176, 32, 121, 97)
GUICtrlSetLimit(-1, 200) ; to limit horizontal scrolling
GUICtrlSetData(-1, $MESSAGE)
$close = GUICtrlCreateButton("my closing button", 64, 160, 175, 25)
GUISetState()
$msg = 0
While $msg <> $GUI_EVENT_CLOSE
$msg = GUIGetMsg()
Select
Case $msg = $add
GUICtrlSetData($mylist, "You clicked button No1|")
Case $msg = $clear
GUICtrlSetData($mylist, "")
Case $msg = $close
MsgBox(0, "", "the closing button has been clicked", 2)
Exit
EndSelect
WEnd
EndFunc ;==>Example