Represents line numbers in the left margin or to the left of each newspaper-style column.
Using the LineNumbering Object
Use the LineNumbering property to return the LineNumbering object. The following example applies line numbering to the text in the first section of the active document.
With ActiveDocument.Sections(1).PageSetup.LineNumbering
.Active = True
.CountBy = 5
.RestartMode = wdRestartPage
End With
The following example applies line numbering to the pages in the current section.
Selection.PageSetup.LineNumbering.Active = True