Gets the background image specified by the appearance object's settings.
A Image object representing the element's background image as specified by the appearance object's settings.
If the appearance object's AppearanceOptions.UseImage property is set to false and it has a parent, this method returns the parent's background image. Otherwise, the current appearance object's AppearanceObject.Image property value is returned.
Note that the appearance object's AppearanceObject.ParentAppearance property is read only. The parent can only be specified when the appearance object is created.