[PP 2007] Glow Transparency On A Shape?

When I create a shape and then go to Format->Shape Styles->Shape Effects->Glow->More Glow Colors->More Colors I can adjust the color of the glow effect as well as the transparency of the glow effect.

I've been trying to do this same effect through VBA, but I've been unsuccessful. I finally figured out how to change the RGB color of the glow effect on a shpae as well as it radius, but not it's transparency. How would I do that in VBA?

So far I got:

Code:

---

Sub Macro1()
    With ActivePresentation.Slides(1).Shapes.Item("save").Glow
        .Color.ObjectThemeColor = msoThemeColorAccent1
        .Radius = 11
        .Transparency = 60 '??????????????
    End With
End Sub

---

Anyone know how to do this?