Everything is in the title...
AutoCAD's Help menu's have been failing lately! In 2010 I have a link in my favorites for "C:\Program Files\AutoCAD Civil 3D 2010\Help\acad_dev180.chm" If you look in the help folder for 2012 you should find a file with a similar name "DEV" is what you're looking for. This is for 'Developer' help I think.
If this doesn't work try typing vlide in the command line. This opens the Visual LISP IDE then hit F1 for help and it should take you there.
Good Luck.
I forgott to mention I am using a french version... Well in the mean time I found out that the help files are in my local install but not accessible when I press F1, this is probably because someone at Autodesk though french users cannot read english... How could I possibly restore this LISP help files to be accessible when I press F1? Thanks.
I think you can add a keyboard shortcut to Help... Try adding it in the main CUIx. (See image)
Yes but this will not restore contextual help.