bug#30010: 25.3; changing layout in Windows 8.1 causes endless scroll in echo-area

[martin rudalics]

> Are you talking about Emacs 26 or later?  This bug report is about
> Emacs 25, where AFAIR the above was not true.

I didn't notice that.  So Capslang, instead of consuming the capslock,
emits a scroll keystroke which Windows passes on to Emacs.  This looks
weird enough indeed to not be mentioned anywhere.

> Maybe we finally have a reason to provide a user facility for
> disabling the keyboard hook.  (It would have to be on master, I think,
> as AFAIR it is not very trivial, but maybe I misremember, or missed
> some easy way of doing that.)

I think you already disable them during debugging which IIRC here
inhibits, for example, using the lwindow key as modifier in the
debugged Emacs.

martin