A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
John,
Hey, thanks for asking this. I didn't realize that this had been added but YES.
At least it's in the current Insider version:
Here's a simple example that works here. It simply locks any shapes on slide 1 that are currently not locked and vice versa:
Sub ToggleLock()
Dim osh As Shape
For Each osh In ActivePresentation.Slides(1).Shapes
With osh
osh.Locked = Not osh.Locked
End With
Next
End Sub