Detect "Suplemental language support" on Windows XP

Question

I need a way to programatically determine if this checkbox in control panel is checked (Windows XP):

Screenshot: http://tinyurl.com/3357hhm

The checkbox is in Control Panel - Regional settings - Language - Supplemental language support - and is called "Install files for complex script and right-to-left languages".

It would be best to check for some related registry entry, but I do not know which one. Any ideas?

Answer 1

Here is a duplicate question: http://stackoverflow.com/questions/250564/how-to-check-from-c-are-files-for-complex-script-and-rtl-languages-installed

Answer 2

It seems to me that the same API which I describe in http://stackoverflow.com/questions/3434234/detect-if-any-right-to-left-language-is-installed/3434825#3434825 can be used to verify that the corresponding right-to-left languages are installed.