Re: w32-pass-lwindow-to-system does not work as expected

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 05 Jul 2005 21:14:34 +0200
> From: Lennart Borgman <lennart.borgman.073@student.lu.se>
> 
> To overcome this a low level keyboard hook must be used. A good starting 
> point summary is found at 
> http://www.codeproject.com/win32/AntonioWinLock.asp. Look under subtitle 
> "Hooks".

Watch out for the caveats of using low-level keyboard interfaces: what
the hook gets is the scan code of the key and various bit masks for
the modifier keys.  That means that the application (us) will have to
take care of the key translation machinery, such as mapping the same
keys to different characters depending on the language, translation of
AltGr + KEY combinations to produce special non-ASCII characters, etc.
Eventually, it is quite possible that we will have to introduce
translation code and tables into Emacs for each supported keyboard
input language.  See msdos.c for an example of where this could lead;
that way lies madness.  (The MSDOS port had no good alternative, since
too many useful key combinations would be unavailable for Emacs if it
were to use only the standard keyboard interface.  But I wouldn't
recommend going that way just to fix some obscure misfeature which
most users won't even notice unless explicitly told about.)