button ohne form?

#include <WindowsConstants.au3>
#include <WinAPI.au3>

Global $aButton[2]

$hGUI = GUICreate("MyGUI", 150, 150, -1, -1, $WS_POPUP)
$aButton[0] = GUICtrlCreateButton("Hit Me!", 0, 0, 150)
$aButton[1] = GUICtrlCreateButton("Exit", 0, 50, 150)
GUISetState()

_GuiHole($hGUI, 0, 0, 150, 150)

While 1
    $msg = GUIGetMsg()
    Switch $msg
        Case $aButton[0]
            MsgBox(0, "", "It's magic!")
        Case $aButton[1]
            Exit
    EndSwitch
WEnd

Func _GuiHole($h_win, $i_x, $i_y, $i_sizew, $i_sizeh)
    Local $outer_rgn, $inner_rgn, $combined_rgn
    $combined_rgn = _WinAPI_CreateRectRgn(0, 0, 0, 0)
    _WinAPI_DeleteObject($outer_rgn)
    _WinAPI_DeleteObject($inner_rgn)
    _AddCtrlRegion($combined_rgn, $aButton)                               ;Hier aButton anpassen
    _WinAPI_SetWindowRgn($h_win, $combined_rgn)
EndFunc   ;==>_GuiHole

Func _AddCtrlRegion($full_rgn, $ctrl_id)
    Local $ctrl_pos, $ctrl_rgn
    If IsArray($ctrl_id) Then
        For $i = 0 To UBound($ctrl_id) -1
            $ctrl_pos = ControlGetPos($hGui, "", $ctrl_id[$i])             ;Hier hGUI anpassen
            $ctrl_rgn = _WinAPI_CreateRectRgn($ctrl_pos[0], $ctrl_pos[1], $ctrl_pos[0] + $ctrl_pos[2], $ctrl_pos[1] + $ctrl_pos[3])
            _WinAPI_CombineRgn($full_rgn, $full_rgn, $ctrl_rgn, $RGN_OR)
            _WinAPI_DeleteObject($ctrl_rgn)
        Next
    Else
        $ctrl_pos = ControlGetPos($hGui, "", $ctrl_id)                     ;Hier hGUI anpassen
        $ctrl_rgn = _WinAPI_CreateRectRgn($ctrl_pos[0], $ctrl_pos[1], $ctrl_pos[0] + $ctrl_pos[2], $ctrl_pos[1] + $ctrl_pos[3])
        _WinAPI_CombineRgn($full_rgn, $full_rgn, $ctrl_rgn, $RGN_OR)
        _WinAPI_DeleteObject($ctrl_rgn)
    EndIf
EndFunc   ;==>_AddCtrlRegion