title: Using OPOS in Delphi
body: <p>when I use TOPOSPOSPrinter.open using OPOS an "Interface Not Supported" error message comes up</p>
  
  <p>I try to use a printer IBM4610 but when i use the driver OPUS this problem results.</p>
  
  <p>The code compile.</p>
  
  <p>CODE</p>
  
  <pre><code>function TCustomizedTenderPlugin.HandleEvent: WordBool;
  var
  
    ret:Integer;
  
    mic : Pointer;
  
    {pruebas con opos}
    PosPrinter: TOPOSPOSPrinter;
  
  
  
  begin
    {CREDENCIALES DE LA IMPRESORA . MODIFICAR DEPENDIENDO DEL TIPO}
     CargarIni(puerto);    
  
        try
           {Conexion con impresora}
           PosPrinter:= TOPOSPOSPrinter.Create(nil);
           PosPrinter.Open('4610_IBM',ret); // AQUI DA ERROR
           ShowMessage(VarToStr(ret));
           PosPrinter.Close(ret);
           ShowMessage(VarToStr(ret));
        Except
          // mensaje de error del 
  
          // me da Interface not supported
        end;
  
  
  end;
  </code></pre>
  
  <p>Please I need help.</p>
  
  <p>Thanks for your kind help :)</p>