Resize stage from ContextMenu?

Hello:

I’m using Stage.addListener and Stage.onResize to keep the browser window filled with a “background” MC. This works fine when you resize the browser window.

However, I noticed today the background does not resize when you select from the “Zoom” family (Zoom In, Zoom Out, 100%, Show All) in Flash’s ContextMenu (right-click).

Is there any way to call my Stage.onResize function from these builtInItems?