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