It is not clear whether you want the captions to appear as:
figuur XVI-1
or:
figuur xvi-1
or how you want the cross-references to appear:
figuur XVI-1
or:
figuur xvi-1

If you want the captions to have a non-standard format, the simplest way of doing that is to insert a new one in the correct format, using the 'new label' option, then delete the new caption. Cross-references to the captions will default to that format.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]