[Loviedo]

Para completar.
Visualizar Report:
Coloca en un Form un ScrollBox,RvProject,RvNDRWriter,RvRenderPreview y un Button. Ya tiene tu Preview simple.

Código Delphi [-]
procedure TForm1.Button1Click(Sender: TObject);
var
  NDRStream:  TMemoryStream;
begin
  NDRStream := TMemoryStream.Create;
  Try
    // Asignar Propiedades 
    // RvProject1.ProjectFile := 'C:\Prueba.rav'; 
     // RvProject1.Engine := RvNDRWriter1;
    // RvNDRWriter1.StreamMode := smUser;
    RvProject1.open;
    RvProject1.SelectReport('Report1',true);
    RvProject1.SaveToStream(NDRStream);
    RvNDRWriter1.Stream:=NDRStream;
    RvProject1.Execute;
    RvRenderPreview1.Render(NDRStream);
    RvProject1.close;
  except
    NDRStream.Free;
  end;
end;

Saludos.