RE: Bikeshedding go! Why is <M-f4> unbound?

[Drew Adams]

> > Really?  Good, in that case.  I was under the impression 
> > that simply hitting the key would mean that Windows grabs it.
> 
> Yes, of course. What else should it do?

There are 3 possibilities that have been discussed:
1. It is bound in Emacs. Invoke the Emacs binding.
2. It is not bound.  Raise an Emacs unbound error.
3. It is not bound.  Pass Alt-F4 through to Windows.

No one has disagreed about #1.  You think that #3 is always preferable to #2 and
should become hard-coded behavior.  I think that the choice between #2 and #3
should be up to the user and Emacs libraries if possible.

> No one has suggested that Alt+F4 should be hardcoded to be 
> sent to w32.

Odd that you would say this just after you asked what other behavior could
possibly exist.