ShadowFormat.OffsetY Property (Excel)
Returns or sets the vertical offset of the shadow from the specified shape, in points. A positive value offsets the shadow to the right of the shape; a negative value offsets it to the left. Read/write Single.
This example sets the horizontal and vertical offsets for the shadow of shape three on myDocument. The shadow is offset 5 points to the right of the shape and 3 points above it. If the shape doesn't already have a shadow, this example adds one to it.