Help creating a Template control in ASP.NET

Question

Hi all - I've never created a template control before in ASP.NET, so I'm trying to stumble my way through it! Basically, my template control looks like this:

<%@ Control Language="C#" CodeFile="MyControl.ascx.cs" Inherits="Controls_MyControl" %>
<h2><%= Heading %></h2>

<div id="hide" runat="server">
</div>

<div id="show" runat="server">
</div>

And here's the code-behind:

public partial class MyControl : Control
{
    #region Properties

    public string Heading { get; set; }

    [TemplateContainer(typeof(INamingContainer)), PersistenceMode(PersistenceMode.InnerProperty)]
    public ITemplate HiddenTemplate { get; set; }

    [TemplateContainer(typeof(INamingContainer)), PersistenceMode(PersistenceMode.InnerProperty)]
    public ITemplate ShownTemplate { get; set; }

    #endregion


    override protected void CreateChildControls()
    {
        if (HiddenTemplate != null)
            HiddenTemplate.InstantiateIn(hide);

        if (ShownTemplate != null)
            ShownTemplate.InstantiateIn(show);

        base.CreateChildControls();
    }
}

This works fine if I don't use any databound controls - so if I do this, it's perfect:

<foo:MyControl id="myControl" runat="server">
    <HiddenTemplate>
        <h2>Here is some hidden stuff</h2>
    </HiddenTemplate>
    <ShownTemplate>
        <h2>Here is some shown stuff</h2>
    </ShownTemplate>
</foo:MyControl>

The problem is, I need to use a databound control in the "ShownTemplate", as follows:

<foo:MyControl id="myControl" runat="server">
    <HiddenTemplate>
        <h2>Here is some hidden stuff</h2>
    </HiddenTemplate>
    <ShownTemplate>
        <asp:Repeater id="rpt" runat="server">
            <ItemTemplate>
                <%# Eval("SomeProperty") %>
            </ItemTemplate>
        </asp:Repeater>
    </ShownTemplate>
</foo:MyControl>

How do I enable this type of functionality?

I guess it's like having a Label control nested inside the ItemTemplate of a Repeater - in this case, you need to subscribe to the ItemDataBound event, then locate the Label control using "FindControl"), and bind to it that way. But I'm not sure how I mimic this functionality.

Thanks in advance!