Returns or sets the amount of space (in points) to add to the right of the contents of a single cell or all the cells in a table. Read/write Single.
expression.RightPadding
expression Required. An expression that returns one of the objects in the Applies To list.
The setting of the RightPadding property for a single cell overrides the setting of the RightPadding property for the entire table.
This example sets the right padding for the first table in the active document to 40 pixels.
ActiveDocument.Tables(1).RightPadding = _
PixelsToPoints(40, False)