MailMergeFields.AddMergeRec (Word)
Adds a MERGEREC field to a mail merge main document. Returns a MailMergeField object.
A MERGEREC field inserts the number of the current record (the position of the record in the current query result) during a mail merge.
AddMergeRec (Range)
Range: The location for the MERGEREC field.
Dim rngTemp As Range
Set rngTemp = ActiveDocument.Range(Start:=0, End:=0)
ActiveDocument.MailMerge.Fields.AddMergeRec Range:=rngTemp
rngTemp.InsertAfter "Record Number: "