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.PDFEncrypt := true;
     NVsign.PDFEncryptionType := 'rc4';
     NVsign.PDFOwnerPassword := 'owner';

     // p - document printing is denied
     // e - disable extraction of text and graphics
     NVsign.PDFPermissions := 'pe';
  
     retVal := NVsign.EncryptPDF('c:\in.pdf', 'c:\out.pdf');
     if retVal <> 0 then
       Application.MessageBox(PChar('Error code=' + IntToStr(retVal)),'',0)
     else
       Application.MessageBox('Done','',0);
   end;