|Publisher Developer Reference|
You cannot add fields to the MailMergeDataFields collection. All data fields in a data source are automatically included in the MailMergeDataFields collection.
Use DataFields (index), where index is the data field name or index number, to return a single MailMergeDataField object. The index number represents the position of the data field in the mail merge data source. This example retrieves the name of the first field and value of the first record of the FirstName field in the data source attached to the active publication.
|Visual Basic for Applications|