Is it possible to capture a menu bar by using the Window struct?

[brtg90]

I cannot get this to work. I just use the focused window, but when I expand any option from the menu bar, it does not show up in the screenshots I take with the capture_image() method. I tried on Windows and Linux. Is it possible at all? In case I use the full-screen screenshot provided by the Monitor struct method capture_image(), I do see the expanded menu. I'd prefer to have just the focused window in the image.

Edit: added image to indicate what I mean by expanded menu.