public PdfTextAnnotationFacade AddTextAnnotation(
    PdfPoint point
)

Public Function AddTextAnnotation(
    point As PdfPoint
) As PdfTextAnnotationFacade

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
  // Load a document
  processor.LoadDocument("..\\..\\Document.pdf");

  // Access the first page properties
  PdfPageFacade page = processor.DocumentFacade.Pages[0];

  // Add sticky note at the specified point
  PdfTextAnnotationFacade textAnnotation =
     page.AddTextAnnotation(new PdfPoint(64, 65));

  // Specify annotation parameters
  textAnnotation.Author = "Nancy Davolio";
  textAnnotation.Color = new PdfRGBColor(0.8, 0.2, 0.1);
  textAnnotation.Contents = "Please proofread this document";
}

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Document.pdf")

  ' Access the first page properties
  Dim facade As PdfDocumentFacade = processor.DocumentFacade
  Dim page As PdfPageFacade = facade.Pages(0)

  ' Add sticky note at the specified point
  Dim textAnnotation As PdfTextAnnotationFacade =
     page.AddTextAnnotation(New PdfPoint(64, 65))

  ' Specify annotation parameters
  textAnnotation.Author = "Nancy Davolio"
  textAnnotation.Color = New PdfRGBColor(0.8, 0.2, 0.1)
  textAnnotation.Contents = "Please proofread this document"
End Using