#include <GDIPlus.au3>
#include <WinApi.au3>

Opt('GUIOnEventMode', 1)
Opt('GUICloseOnESC', 0)

_GDIPlus_Startup()

Global $hDC_Desktop = _WinAPI_GetDC(0)
Global $hGraphics = _GDIPlus_GraphicsCreateFromHDC($hDC_Desktop)

While Sleep(25)
    _GDIPlus_GraphicsFillRect($hGraphics, 0,0, 300,200)
WEnd

Func _Exit()
    _GDIPlus_GraphicsDispose($hGraphics)
    _GDIPlus_Shutdown()
    _WinAPI_DeleteDC($hDC_Desktop)
    Exit
EndFunc