System.Object
   DataDynamics.ActiveReports.Viewer.Annotations.Border
      DataDynamics.ActiveReports.Viewer.Annotations.BorderCircle
      DataDynamics.ActiveReports.Viewer.Annotations.BorderRectangle
   DataDynamics.ActiveReports.Viewer.Annotations.SelectionService
   System.Collections.CollectionBase
      DataDynamics.ActiveReports.Viewer.Annotations.AnnotationCollection
   System.MarshalByRefObject
      System.ComponentModel.Component
         DataDynamics.ActiveReports.Viewer.Annotations.Annotation
            DataDynamics.ActiveReports.Viewer.Annotations.AnnotationCircle
            DataDynamics.ActiveReports.Viewer.Annotations.AnnotationLine
            DataDynamics.ActiveReports.Viewer.Annotations.AnnotationRectangle
            DataDynamics.ActiveReports.Viewer.Annotations.AnnotationText
               DataDynamics.ActiveReports.Viewer.Annotations.AnnotationArrow
               DataDynamics.ActiveReports.Viewer.Annotations.AnnotationBalloon

Reference

ActiveReports.Viewer3 Assembly