#include <GDIPlus.au3>
#include <WinAPI.au3>
$hWnd=GUICreate("", 400, 400, -1, -1, -1, 0x00080000)
GUISetState()
_GDIPlus_Startup()
$hBrush=_GDIPlus_BrushCreateSolid(0xFFFFAAFF)
$hGraphics=_GDIPlus_GraphicsCreateFromHWND($hWnd)
_GDIPlus_GraphicsFillRect($hGraphics, 200, 200, 100, 100, $hBrush)
While True
    _GDIPlus_GraphicsFillRect($hGraphics, 200, 200, 100, 100, $hBrush)
    _WinAPI_SetLayeredWindowAttributes($hWnd, 0xFFAAFF, 255)
    Switch GUIGetMsg()
        Case -3
            _GDIPlus_BrushDispose($hBrush)
            _GDIPlus_GraphicsDispose($hGraphics)
            _GDIPlus_Shutdown()
            Exit
    EndSwitch
WEnd