PictureFormat Property
Returns a PictureFormat object that contains picture formatting properties for the specified shape. Applies to Shape or ShapeRange objects that represent pictures or OLE objects. Read-only.
Example
This example sets the brightness and contrast for shape one on myDocument. Shape one must be a picture or an OLE object.
Set myDocument = Worksheets(1)
With myDocument.Shapes(1).PictureFormat
.Brightness = 0.3
.Contrast = .75
End With