XGraphics gfx       = XGraphics.FromPdfPage(this._Page);
XFont font                    = new XFont("Verdana", 10);
XStringFormat format     = new XStringFormat();
XTextFormatter tf         = new XTextFormatter(gfx);
         

XRect Text = new XRect (20, this._Offset+100, 100, 100);
tf.Alignment = XParagraphAlignment.Left;
tf.DrawString("appointment", font, XBrushes.Black, Text, XStringFormats.TopLeft);

// I try to set the web link at the same position like the string "appointment"
XRect rec = new XRect (20, this._Offset+100, 20, 12);
PdfRectangle Pdfrec = new PdfRectangle (rec);

// google is just a test link   
gfx.PdfPage.AddWebLink(Pdfrec, "http://www.google.de");
gfx.Dispose ();