RE: C-M-TAB stand-in for M-TAB, on MS Windows?

[Drew Adams]

> Also, in Emacs one can use C-M-i and in most contexts ESC tab, as an 
> alternative to M-tab. Windows does not have any keyboard 
> alternative to Alt-tab.

Why does Windows need an alternative? If you prefer that Windows grab ALT-TAB
from Emacs, then you can set that as your preference - no problem. 

The question is about the default Emacs behavior, that is, the default behavior
of M-TAB within Emacs.

And the higher priority question is about _documenting_ the ability to configure
this using `w32-(un)register-hot-key'.