RE: use of special-event-map

[Drew Adams]

    The `iconify-frame' event is just informing that the frame has
    been iconified.

That answers my question. The event indicates that iconification has
occurred, not that the "minimize" button was clicked.

That's the info I was missing - thanks for it. I didn't know at what point
Emacs received a window-manager event for this. I found no explanation of
special events like [iconify-frame] in such terms. I tried to follow the
code that deals with this event (in parts of w32term.c, xterm.c, frame.c,
and keyboard.c), but this wasn't clear to me.