ZOrderPosition Property Example
This example adds an oval to myDocument
and then places the oval second from the back in the z-order if there is at least one other shape on the slide.
Set myDocument = ActivePresentation.Slides(1)
With myDocument.Shapes.AddShape(msoShapeOval, 100, 100, 100, 300)
While .ZOrderPosition > 2
.ZOrder msoSendBackward
Wend
End With