[AUI] Notifying user clicking the close button on a AUI managed window

[Mario Figueiredo]

Hello everyone,

I can't seem to find a way to be notified of mouse clicks on AUI
managed windows that where constructed with close buttons. I need this
to programatically uncheck the View menu item that controls that
window visibility.

What's the event that I can tap into that tells me when these close
buttons where clicked?

TIA,
Mario Figueiredo