Aero Glass Button

Wenn ich fologendes verwende kann man den Button nicht mehr lesen. Wa kann ich machen das der Button nicht im Aero "verschwindet"?
#include <StructureConstants.au3>
#include <GUIConstants.au3>

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$GUI = GUICreate("Windows 7 DWM", 243, 243)
$Apply = GUICtrlCreateButton("Apply", 80, 104, 83, 25, 0)
GUISetState(@SW_SHOW)

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While 1
$iMsg = GUIGetMsg()
Switch $iMsg
Case $GUI_EVENT_CLOSE
Exit
Case $Apply
$Ret = ApplyGlass($GUI,243,243,243,243,0x000000); produces full glass window, the glass is red colored
EndSwitch
WEnd

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Func ApplyGlass($hWnd,$leftw,$rightw,$toph,$bottomh,$glasscolor = "0x000000")
$struct=DllStructCreate("int cxLeftWidth;int cxRightWidth;int cyTopHeight;int cyBottomHeight;")
DllStructSetData($struct,"cxLeftWidth",$leftw)
DllStructSetData($struct,"cxRightWidth",$rightw)
DllStructSetData($struct,"cyTopHeight",$toph)
DllStructSetData($struct,"cyBottomHeight",$bottomh)
GUISetBkColor($glasscolor)
Return DllCall("dwmapi.dll", "int", "DwmExtendFrameIntoClientArea", "hwnd", $hWnd, "ptr", DllStructGetPtr($struct))
EndFunc

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