GNU Emacs Lisp Reference Manual

18.5.10: Miscellaneous Window System Events

A few other event types represent occurrences within the window system.

(delete-frame (frame))

This kind of event indicates that the user gave the window manager a command to delete a particular window, which happens to be an Emacs frame.

The standard definition of the delete-frame event is to delete frame.

(iconify-frame (frame))

This kind of event indicates that the user iconified frame using the window manager. Its standard definition is ignore; since the frame has already been deiconified, Emacs has no work to do. The purpose of this event type is so that you can keep track of such events if you want to.

(make-frame-visible (frame))

This kind of event indicates that the user deiconified frame using the window manager. Its standard definition is ignore; since the frame has already been iconified, Emacs has no work to do.

If one of these events arrives in the middle of a key sequence---that is, after a prefix key---then Emacs reorders the events so that this event comes either before or after the multi-event key sequence, not within it.