This example adds a border of black dots around each page in first section in the selection.
For Each aBorder In Selection.Sections(1).Borders
aBorder.ArtStyle = wdArtBasicBlackDots
aBorder.ArtWidth = 6
Next aBorder
This example adds a picture border around each page in section one in the active document.
With ActiveDocument.Sections(1)
.Borders.AlwaysInFront = True
For Each aBord In .Borders
aBord.ArtStyle = wdArtPeople
aBord.ArtWidth = 15
Next aBord
End With