'宣言 Public Class WatermarkAnnotation Inherits AnnotationBase Implements GrapeCity.Documents.Common.IOwnedObject, GrapeCity.Documents.Pdf.IDocProvider, GrapeCity.Documents.Pdf.Structure.IContentItem
public class WatermarkAnnotation : AnnotationBase, GrapeCity.Documents.Common.IOwnedObject, GrapeCity.Documents.Pdf.IDocProvider, GrapeCity.Documents.Pdf.Structure.IContentItem