Как нарисовать графический элемент на стороннем приложении?

#Include <WindowsConstants.au3>

Global $X, $Y

Run('Calc.exe')
If Not WinWait('Калькулятор Плюс', '', 3) Then
    MsgBox(0, '', 'Калькулятор Плюс not found!')
    Exit
EndIf

$hWnd = WinGetHandle('Калькулятор Плюс')
$hForm = GUICreate('', 50, 19, -1, -1, $WS_POPUP, -1, $hWnd)
$Button = GUICtrlCreateButton('OK', 0, 0, 50, 19)
GUISetState(@SW_SHOWNOACTIVATE)

While 1
    $Pos = WinGetPos($hWnd)
    If @error Then
        Exit
    EndIf
    If ($X <> $Pos[0]) Or ($Y <> $Pos[1]) Then
        $X = $Pos[0]
        $Y = $Pos[1]
        WinMove($hForm, '', $X + 201, $Y + 29)
    EndIf
    $Msg = GUIGetMsg()
    Switch $Msg
        Case $Button
            MsgBox(0, '', 'OK')
    EndSwitch
WEnd

#Include <GDIPlus.au3>

Run('calc.exe')
If Not WinWaitActive('Calculator', '', 3) Then
	Exit
EndIf

$hWnd = WinGetHandle('Calculator')
_GDIPlus_Startup()
$hGraphic = _GDIPlus_GraphicsCreateFromHWND($hWnd)
$hPen = _GDIPlus_PenCreate(0xFFFF0000, 3)
_GDIPlus_GraphicsDrawEllipse($hGraphic, 10, 10, 100, 100, $hPen)
_GDIPlus_GraphicsDispose($hGraphic)
_GDIPlus_PenDispose($hPen)
_GDIPlus_Shutdown()