et( gui.ListBox, <code class="STRING">'Value'</code>, data.SelectedDemo );</font></pre></example>
        <p><b>2. Update the help button label</b></p>
        <example><pre style="background-color: #eeeeff; margin-left: 20px; margin-right: 20px"><font color="#000011">demoName = data.DemoNames{ data.SelectedDemo };<br/><a href="matlab:doc set"><code class="FUNCTION">set</code></a>( gui.HelpButton, <code class="STRING">'String'</code>, [<code class="STRING">'Help for '</code>,demoName] );</font></pre></examp