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Example 1: Sign a PDF file with an invisible signature (VC#)  

Note: Add a reference in your project to PDFsignNET
To do this:
  a. On the Project menu, click Add Reference;
  b. On the .NET tab, locate PDFsignNET and then click Select;
  c. Click OK in the Add References dialog box to accept your selections.
   Neevia.PDFsign NVsign = new Neevia.PDFsign();
   int retVal;

   NVsign.CertificateSubject = "Test certificate";
   NVsign.CertificatePassword = "password";

   NVsign.Reason = "I am the creator of this document";

   NVsign.Invisible = true;

   retVal = NVsign.SignPDF(@"c:\in.pdf",@"c:\out.pdf");
   if (retVal != 0) {
     MessageBox.Show("Error code = " + retVal.ToString());
   } else {
     MessageBox.Show("Done");
   }


After testing PDFsign I can certainly say that it makes the signing of PDF documents easy for anyone who needs to perform such a task.

Martin Leary

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