      /**
       * The constants used in this Content Widget.
       */
      public static interface CwConstants extends Constants,
          ContentWidget.CwConstants {
        String cwMessagesExampleArg0Label();

        String cwMessagesExampleArg1Label();

        String cwMessagesExampleArg2Label();

        String cwMessagesExampleDescription();

        String cwMessagesExampleFormattedLabel();

        String cwMessagesExampleLinkText();

        String cwMessagesExampleName();

        String cwMessagesExampleTemplateLabel();
      }

      /**
       * The {@link TextBox} where the user enters argument 0.
       */
      private TextBox arg0Box = null;

      /**
       * The {@link TextBox} where the user enters argument 1.
       */
      private TextBox arg1Box = null;

      /**
       * The {@link TextBox} where the user enters argument 2.
       */
      private TextBox arg2Box = null;

      /**
       * An instance of the constants.
       */
      private CwConstants constants;

      /**
       * The error messages used in this example.
       */
      private ErrorMessages errorMessages = null;

      /**
       * The {@link HTML} used to display the message.
       */
      private HTML formattedMessage = null;

      /**
       * Initialize this example.
       */
      @Override
      public Widget onInitialize() {
        // Create the internationalized error messages
        errorMessages = GWT.create(ErrorMessages.class);

        // Use a FlexTable to layout the content
        FlexTable layout = new FlexTable();
        FlexCellFormatter formatter = layout.getFlexCellFormatter();
        layout.setCellSpacing(5);

        // Add a link to the source code of the Interface
        HTML link = new HTML(" <a href=\"javascript:void(0);\">ErrorMessages</a>");
        link.addClickHandler(new ClickHandler() {
          public void onClick(ClickEvent event) {
            selectTab(2);
          }
        });
        HorizontalPanel linkPanel = new HorizontalPanel();
        linkPanel.setSpacing(3);
        linkPanel.add(new HTML(constants.cwMessagesExampleLinkText()));
        linkPanel.add(link);
        layout.setWidget(0, 0, linkPanel);
        formatter.setColSpan(0, 0, 2);

        // Show the template for reference
        String template = errorMessages.permissionDenied("{0}", "{1}", "{2}");
        layout.setHTML(1, 0, constants.cwMessagesExampleTemplateLabel());
        layout.setHTML(1, 1, template);

        // Add argument 0
        arg0Box = new TextBox();
        arg0Box.setText("amelie");
        layout.setHTML(2, 0, constants.cwMessagesExampleArg0Label());
        layout.setWidget(2, 1, arg0Box);

        // Add argument 1
        arg1Box = new TextBox();
        arg1Box.setText("guest");
        layout.setHTML(3, 0, constants.cwMessagesExampleArg1Label());
        layout.setWidget(3, 1, arg1Box);

        // Add argument 2
        arg2Box = new TextBox();
        arg2Box.setText("/secure/blueprints.xml");
        layout.setHTML(4, 0, constants.cwMessagesExampleArg2Label());
        layout.setWidget(4, 1, arg2Box);

        // Add the formatted message
        formattedMessage = new HTML();
        layout.setHTML(5, 0, constants.cwMessagesExampleFormattedLabel());
        layout.setWidget(5, 1, formattedMessage);
        formatter.setVerticalAlignment(5, 0, HasVerticalAlignment.ALIGN_TOP);

        // Add handlers to all of the argument boxes
        KeyUpHandler keyUpHandler = new KeyUpHandler() {
          public void onKeyUp(KeyUpEvent event) {
            updateMessage();
          }
        };
        arg0Box.addKeyUpHandler(keyUpHandler);
        arg1Box.addKeyUpHandler(keyUpHandler);
        arg2Box.addKeyUpHandler(keyUpHandler);

        // Return the layout Widget
        updateMessage();
        return layout;
      }

      /**
       * Update the formatted message.
       */
      private void updateMessage() {
        String arg0 = arg0Box.getText().trim();
        String arg1 = arg1Box.getText().trim();
        String arg2 = arg2Box.getText().trim();
        formattedMessage.setText(errorMessages.permissionDenied(arg0, arg1, arg2));
      }