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