Guessed
I apologize for the strong flavour of bad formatting practices. I'm trying to improve, but it is not always easy, since this is not my profession or main activity.
I do apply styles, but on documents which I receive from others, and to do so automatically I often have to 'clean' what I find (any sort of things).
Many thanks for suggesting the use of wdUndefined and especially for your patience, past and present.

Gmaxey
Thanks a lot for providing an example and for all your explanations. I will try to conform to your practices, while I envy your mastery of the subject.