The registry-key I posted above is ...
a) a current "project" to set the preview-window in file-open-dialogue
(If there is an existing solution - hints are welcome).
b) a good example for the problem.
"How to create a Lisp which ...
a) switch the key "PreviewVisible" between 0 and 1
b) works in current AutoCAD-version (2012 - 2016)
c) and in "all" languages? to a) Simple vl-registry-write. No problem.
to b) I have to loop through versions and profiles and ....
That should be no problem; snippets are here in the Swamp
to c) How to know / to find / to select language-dependent keys like "Datei wählen"? To solve it for one language is clear, but how to solve it for "all" languages?
...Dialogs subhives have same names - ....
Really every key? I have a few keys (see above) which are in German; the greatest part is in English.