<eo:callbackpanel id="CallbackPanel1" runat="server" Triggers="{ControlID:Button1;Parameter:},{ControlID:Button2;Parameter:}">
	<eo:TreeView id="tvLibraryStructure" runat="server" AllowDragDrop=true 
        AllowDragReordering=true ControlSkinID="None"
		Width="200px" Height="200px" OnItemMoved="TreeView1_ItemMoved" 
        OnItemClick="Button1_Click" 
        onload="TreeView1_ItemMoved">		
	</eo:TreeView>
	<P>The data source is not updated until the page posts back and triggers <STRONG>ItemMoved</STRONG>
		event.</P>
	<P>
		<asp:Button id="Button1" runat="server" Text="Post Back" OnClick="Button1_Click"></asp:Button> 
		<asp:Label id="Label1" Runat="server"></asp:Label></P>
	<P>Click this button to repopulate the TreeView from data source to verify that the 
		data source has been updated.</P>
	<P>
		<asp:Button id="Button2" runat="server" Text="Rebind" OnClick="Button2_Click"></asp:Button> 
		<asp:Label id="Label2" Runat="server"></asp:Label></P>
</eo:callbackpanel>

protected void Page_Load(object sender, EventArgs e)
		{
			if (!IsPostBack)
			{ 
				ConnectToSP(); //does some SP stuff
				LoadLoggedInUserDetails();
				BuildColleagueList();

                                //Populate the EO Treeview Control with Document Library
				BuildLibraryTree(); 
			}
		}

//This never gets fired
protected void TreeView1_ItemMoved(object sender, EO.Web.TreeNodeMovedEventArgs e)
        {
            lblStatus.Text = "This is working";
        }

protected void Button1_Click(object sender, EventArgs e)
        {
            Label1.Text = "Changes saved to data source at " + DateTime.Now.ToString();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            
            Label2.Text = "Repopulated from data source at " + DateTime.Now.ToString();
        }

private const string _ascxPath = @"~/_CONTROLTEMPLATES/CustomWebPartProject/MyVisualWebPart/MyVisualWebPartUserControl.ascx";

protected override void CreateChildControls()
{
   Control control = Page.LoadControl(_ascxPath);
   Controls.Add(control);            
}