If the form also needs to be printed out and filled in, the article Greg
mentioned may be best, but if the form is *only* to be filled out online,
see
http://word.mvps.org/FAQs/Customization/FillinTheBlanks.htm and
especially the forms tutorials by Dian Chapman that this article links to.
Note that, if a form is going to be filled out online, you don't, strictly
speaking, need any lines, but if you do want them, then table borders are
what most people use because tables (with fixed row height and preferred
cell width) also keep the form fields in place.
--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
http://word.mvps.org