ShadowFormat.Transparency Property (Word)
Returns or sets the degree of transparency of the specified shadow as a value between 0.0 (opaque) and 1.0 (clear). Read/write Single.
Syntax
expression .Transparency
expression Required. A variable that represents a ShadowFormat object.
Example
This example sets the shadow of shape three in the active document to semitransparent red. If the shape doesn't already have a shadow, this example adds one to it.
With ActiveDocument.Shapes(3).Shadow
.Visible = True
.ForeColor.RGB = RGB(255, 0, 0)
.Transparency = 0.5
End With