This example adds a borders below the first row in table one in the active document.
If ActiveDocument.Tables.Count >= 1 Then
With ActiveDocument.Tables(1).Rows(1).Borders(wdBorderBottom)
.LineStyle = wdLineStyleSingle
.LineWidth = wdLineWidth050pt
End With
End If
This example adds a wavy, red line to the left of the selection.
With Selection.Borders(wdBorderLeft)
.LineStyle = wdLineStyleSingleWavy
.LineWidth = wdLineWidth075pt
.ColorIndex = wdRed
End With