Code Samples - Neevia PDFsign/encrypt

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   uses ComObj;
      .....

   procedure TForm1.Button1Click(Sender: TObject);
   var
     NVsign : Variant;
     retVal : Integer;
   begin
     NVsign := CreateOleObject('PDFsign.Neevia');
 
     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 then
       Application.MessageBox(PChar('Error code=' + IntToStr(retVal)),'',0)
     else
       Application.MessageBox('Done','',0);
   end;