Thanks Bonnie.

>Cathi,
>
>Well, it's not exactly trivial, but I guess it's not too long to post here. I'm assuming some familiarity with the article. For those who haven't read it, read it first.
>
>To dynamically load your UserControl, use this code:
>

>//use this if your UserControl is in the same web directory
>this.MyControlHost.UserControlPath = "MyUserControl.ascx";
>
>//use this if your UserControl is in another web directory
>this.MyControlHost.UserControlPath = "~/MyDirectory/MyUserControl.ascx";
>

>
>Here's the part I missed. This overridden property needs to be in your UserControl base class:
>

>public override string UniqueID
>{
>    get
>    {
>        if (this.Parent.Parent != null)
>            return this.Parent.Parent.UniqueID + "ctl0";
>        else
>            return base.UniqueID;
>    }
>}
>

>
>And here's the DynamicControlHost ...
>
>

>using System;
>using System.Data;
>using System.Drawing;
>using System.Web;
>using System.Web.UI;
>using System.Web.UI.WebControls;
>using System.Web.UI.HtmlControls;
>
>namespace YourNameSpaceHere
>{
>	public class DynamicControlHost : System.Web.UI.UserControl
>	{
>		#region Declarations
>
>		protected string m_UserControlPath = "";
>
>		protected System.Web.UI.WebControls.Panel WorkBox;
>
>		#endregion
>
>		#region Properties
>
>		public string UniqueKey
>		{
>			get {return this.UniqueID + "DynamicControl";}
>		}
>
>		public string UserControlPath
>		{
>			get
>			{
>				if (this.m_UserControlPath.Length == 0 && Request.Form[this.UniqueKey] != null)
>					this.m_UserControlPath = Request.Form[this.UniqueKey];
>
>				return this.m_UserControlPath;
>			}
>
>			set
>			{
>				if (this.WorkBox.Controls.Count > 0)
>				{
>					// If a control is already instantiated, and it's not the same one that's
>					// currently being requested, remove it before adding the new one
>					if (this.UserControlPath != value)
>					{
>						this.WorkBox.Controls.Remove(this.WorkBox.Controls[0]);
>						this.WorkBox.Controls.Add(Page.LoadControl(value));
>						this.m_UserControlPath = value;
>					}
>				}
>				else
>				{
>					this.WorkBox.Controls.Add(Page.LoadControl(value));
>					this.m_UserControlPath = value;
>				}
>			}
>		}
>
>		public Control UserControl
>		{
>			get
>			{
>				if (this.WorkBox.Controls.Count > 0)
>					return this.WorkBox.Controls[0];
>				else
>					return null;
>			}
>		}
>
>		#endregion
>
>		#region Page Init / Load
>
>		private void Page_Init(object sender, System.EventArgs e)
>		{
>			// If it's a PostBack, change the ID of this control to what it was previously
>			if (this.Page.IsPostBack && this.UserControlPath.Length != 0)
>				this.WorkBox.Controls.Add(Page.LoadControl(this.UserControlPath));
>		}
>
>		private void Page_Load(object sender, System.EventArgs e)
>		{
>			// Put user code to initialize the page here
>		}
>
>		#endregion
>
>		#region Web Form Designer generated code
>		override protected void OnInit(EventArgs e)
>		{
>			//
>			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
>			//
>			InitializeComponent();
>			base.OnInit(e);
>		}
>		
>		/// <summary>
>		///		Required method for Designer support - do not modify
>		///		the contents of this method with the code editor.
>		/// </summary>
>		private void InitializeComponent()
>		{
>			this.Load += new System.EventHandler(this.Page_Load);
>			this.Init += new System.EventHandler(this.Page_Init);
>
>		}
>		#endregion
>
>		#region Methods
>
>		protected override void Render(System.Web.UI.HtmlTextWriter writer)
>		{
>			base.Render (writer);
>			// (char)34
>			writer.Write("<input type=\"hidden\" name=\"" + this.UniqueKey + "\"value=\"" +this.UserControlPath + "\"/>");
>		}
>
>		#endregion
>
>	}
>}
>