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   procedure TForm1.ExtractPageClick(Sender: TObject);
   var
     DC : Variant;
     RVal : Integer;
     pageToExtract : Integer;
   begin

      pageToExtract := 2;
      try
        DC := CreateOleObject('Neevia.docConverter');
        RVal := DC.extractPDFpages('c:\users\public\test.pdf', 'c:\users\public\page.pdf', pageToExtract, pageToExtract);
        If (RVal <> 0) Then
          ShowMessage('Error extracting PDF page!!! Code: '+IntToStr(RVal))
        Else
          ShowMessage('Done !!!');
      finally
        DC:= Unassigned;
      end;

   end;