make html code appear

i want to click on  abutton and have this code appear in my asp.net webapage, vb.net code behind.

Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
'code goe shere so it displays on webpage

    End Sub

how do i do this?

 
<div class="sidebox">
<div class="boxhead"><h2>Teacher Version</h2></div>
<div class="boxbody">
<asp:Label ID="Label13" runat="server" Text="Label"></asp:Label>

<br />
<br />
</div>
</div>
...