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   procedure convertTIFFtoPDF();
   var
     DC : Variant;
     RVal : Integer;
     docToConvert : String;
   begin
     docToConvert := 'c:\users\public\test.tif';

     try
       DC := CreateOleObject('Neevia.docCreator');
       RVal := DC.ConvertImage(docToConvert, docToConvert + '.pdf');

       If (RVal <> 0) Then
         ShowMessage('Error while converting image!!! Code: '+IntToStr(RVal))
       else
         ShowMessage('Done converting !!!');
     finally
       DC := Unassigned;
     end;
   end;