In a Word document I don't know of a listbox that can display the full list and allow multiselect. I have uses multiselect listboxs in vba userforms though.

The best I can suggest for a Word questionnaire is to use either
1. a dropdown list content control inside a repeating section content control
2. a series of check box content controls

If the document is intended to be used in soft or hard copy form then option 2 is the way I would do it.

__________________
Andrew Lockton
Chrysalis Design, Melbourne Australia