How to get the list of displayed Views/Folders from E-Mail database

Is there any way to fetch the list of views and folders displayed in the Lotus Notes client Mail form using the C API?

It is possible to locate this information under the “NotesMailOutline” using the Lotus Notes Designer, but I do not see how to access it through the C API. No C API type seems to define the format of this data.

Thanks in advance for your help.