using GrapeCity.ActiveReports.Document.Section.Annotations;
rptAnnotations rpt = new rptAnnotations();
private void AddAnnotations()
{
//Run the report first
rpt.Run();
//Assign the viewer
this.viewer1.Document = rpt.Document;
//Create an annotation and assign property values
AnnotationCircle circle = new AnnotationCircle();
circle.Color = System.Drawing.Color.GreenYellow;
circle.Border.Color = System.Drawing.Color.Chartreuse;
//Add the annotation
circle.Attach(1,1); //screen location
this.viewer1.Document.Pages[0].Annotations.Add(circle);
//Set the size properties. The annotation must be added to the page first.
circle.Height = 0.25f;
circle.Width = 0.50f;
//Save annotations to an RDF file
rpt.Document.Save("C:\\MyAnnotations.rdf");
}