VBA - Word bookmarks alternative

I am currently working on a VB application that uses bookmarks on a word template
to insert fields from a database.

I have been instructed to use an alternative method that is supposed to be
called DataField. The advantage is apparently that you can use DataFields
to set the same reference in multiple places in a word document. Bookmarks
requires a seperate reference on each occaision even if the contents of the
field are the same.

For example if typing a letter and you insert the recipient "Mr J. Smith"
in a number of locations on the letter with bookmarks you have to set up
a distinct reference each time.

Does anyone know anything about using DataFields or perhaps it's called something
else. But apparently it exists and is superior to using bookmarks.

Any help would be greatly appreciated.

Jeff