GUICtrlCreateGraphic transparente machen

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <ButtonConstants.au3>
#include <GUIConstantsEx.au3>
#include <StaticConstants.au3>
#include <WindowsConstants.au3>
#Include <WinAPI.au3>
#include <ColorConstantS.au3>



$Form1 = GUICreate("Form1", 200, 200, 663, 317, -1, $WS_EX_LAYERED)
GUISetBkColor(0x0000F4)
_WinAPI_SetLayeredWindowAttributes($Form1, 0x0000F4)


GUICtrlCreateGraphic(0, 100, 200, 4)
GUICtrlSetBkColor(-1, 0x000000)

GUICtrlCreateGraphic(0, 50, 200, 4)
GUICtrlSetBkColor(-1, 0x000000)

GUICtrlCreateGraphic(0, 150, 200, 4)
GUICtrlSetBkColor(-1, 0x000000)

GUICtrlCreateGraphic(100, 0, 4, 200)
GUICtrlSetBkColor(-1, 0x000000)

GUICtrlCreateGraphic(50, 0, 4, 200)
GUICtrlSetBkColor(-1, 0x000000)

GUICtrlCreateGraphic(150, 0, 4, 200)
GUICtrlSetBkColor(-1, 0x000000)

GUISetState(@SW_SHOW)
While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            Exit

    EndSwitch
WEnd