How can I disable the ISO14755 shift-ctrl hotkey?

[Gregor Zattler]

Hi Thomas,
* Thomas Adam <thomas.adam22 at gmail.com> [02. Mär. 2009]:
> 2009/3/2 Gregor Zattler <telegraph at gmx.net>:
>> * Gregor Zattler <telegraph at gmx.net> [25. Aug. 2007]:
>>> * Yin Wang <shredderyin at gmail.com> [22. Apr. 2006]:
>>>> I'm using Emacs inside rxvt-unicode. Often I use something like a
>>>> Control+Shift combination. For example C-@ (set-mark-command) is
>>>> actually Control+Shift+2 on my keyboard. Because urxvt captured
>>>> Control+Shift, this key stops to function in my Emacs. If I press this
>>>> key, the small window "ISO 14755 mode" appears, which is very
>>>> annoying. I can't disable this window even using --disable-iso14755 in
>>>> configure.
>>> [...]
>>>> Is there a way to turn this feature off completely?
>>>
>>> Last year Ilya Voyager Schurov sugggested to hack the source
>>> code.  Isn't there any other way of disabeling the whole feature?
>>> I start urxvt with ++iso14755_52 but this only stops the "Keycap
>>> picture insert mode" window but not the "ISO 14755 mode" window.
>>> Any ideas other than hacking the code -- which I'm not able to
>>> do?
>>
>> Any idea on this problem?  I now use emacs org mode which heavily
>> relies on ctrl-shift key combos.
> 
> ./configure --disable-iso14755

That's a bit inconvinient but yes: it works for rxvt.  Alas,
emacs started in a terminal does not recognize shift+ctrl key
combos.  Back to square one...

Ciao, Gregor