#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <WinAPI.au3>
$Main_GUI = GUICreate("", 400, 400, -1, -1, $WS_POPUP, BitOR($WS_EX_TOPMOST, $WS_EX_LAYERED))
GUISetBkColor(0xCCCCCC)
GUICtrlCreateLabel("+", 200, 130, 50, 50)
GUICtrlSetFont(-1, 36)
GUICtrlSetColor(-1, 0xFF0000)
GUISetState(@SW_SHOW, $Main_GUI)
_WinAPI_SetLayeredWindowAttributes($Main_GUI, 0xCCCCCC, 0, $LWA_COLORKEY)
While GUIGetMsg() <> $GUI_EVENT_CLOSE
WEnd