#Include <WinAPIEx.au3>
#Include <WindowsConstants.au3>
$hForm = GUICreate('MyGUI', 200, 200, -1, -1, $WS_POPUP, $WS_EX_LAYERED)
GUISetBkColor(0xABABAB)
$Label1 = GUICtrlCreateLabel(" *** Label *** ", 10, 10, 148, 40)
GUICtrlSetFont(-1, 18, 400, 0, "MS Sans Serif")
GUISetState()
_WinAPI_SetLayeredWindowAttributes($hForm, 0xABABAB, 255, BitOR($LWA_COLORKEY, $LWA_ALPHA))
Do
Until GUIGetMsg() = -3