expression.LineSpacing
expression Required. An expression that returns one of the objects in the Applies To list.
Remarks
You can use the LineSpacingRule property to set the line spacing to a preset value.
Example
This example sets the line spacing of the paragraph at the cursor position to three lines. This example assumes the insertion point is in a text box.
Sub SetLineSpacing()
Selection.TextRange.ParagraphFormat.LineSpacing = 3
End Sub