The Type property returns or specifies the extrusion type. This property returns cdrExtrudeType.
Examples:
The following VBA example changes the type of all extrusions from Back Parallel to Small Back.
Sub Test()
Dim s As Shape
For Each s In ActivePage.Shapes
If s.Type = cdrExtrudeGroupShape Then
If s.Effect.Extrude.Type = cdrExtrudeBackParallel Then
s.Effect.Extrude.Type = cdrExtrudeSmallBack
End If
End If
Next s
End Sub