{ BARCODE \u "LiteralText" or Bookmark \b [Switches ] }
Inserts a postal bar code, which is a machine-readable form of address used by the U.S. Postal Service. The BARCODE field (field: A set of codes that instructs Microsoft Word to insert text, graphics, page numbers, and other material into a document automatically. For example, the DATE field inserts the current date.) can insert either a POSTNET delivery-point bar code or a Facing Identification Mark, or FIM.
It's easiest to insert postal bar codes with the Envelopes and Labels command (Tools menu, Letters and Mailings submenu).
Example
The fields { BARCODE ENV_ZIPCODE1 \b \u } and { BARCODE ENV_ZIPCODE1 \b \u \f "A" } are inserted with the Envelopes and Labels command (Tools menu, Letters and Mailings submenu).