Returns or sets a Single indicating the brightness of the specified picture or OLE object. The value for this property must be a number from 0.0 (dimmest) to 1.0 (brightest). Read/write.
expression.Brightness
expression Required. An expression that returns one of the objects in the Applies To list.
Use the IncrementBrightness method to incrementally adjust the brightness from its current level.
This example sets the brightness for the first shape in the active publication. The shape must be either a picture or an OLE object.
ActiveDocument.Pages(1).Shapes(1).PictureFormat _ .Brightness = 0.3