protected void Page_Load(object sender, EventArgs e)
    {
        //Required for double click post back.
        if (Page.IsPostBack)
        {
            if (Page.Request.Form["__EVENTTARGET"] == "lbOrgHier")
            {
                OrgHierCtl1.dblClick();
            }
        }

Table tblMain = new Table();
                TableRow tr = new TableRow();
                TableCell tc = new TableCell();
                tblMain.ID = "tblMain";
              
                tc.ColumnSpan = 2;
                
                Label lblHeader = new Label();
                lblHeader.CssClass = "CtrlStyle";
                lblHeader.ID = "lblHeader";
                
                tc.Controls.Add(lblHeader);
                tr.Cells.Add(tc);
                tblMain.Rows.Add(tr);

                tr = new TableRow();
                tc = new TableCell();
                tc.ColumnSpan = 2;

                UpdatePanel up = new UpdatePanel();
                up.ID = "updtPnlLb";
                up.ChildrenAsTriggers = true;
                AsyncPostBackTrigger _trig = new AsyncPostBackTrigger();
                _trig.ControlID = "lbOrgHier";
                up.Triggers.Add(_trig);
                
                
                
                //Main List Box

                ListBox lb = new ListBox();
                lb.CssClass = "ListBoxStyle";
                
                lb.ID = "lbOrgHier";
                lb.SelectionMode = ListSelectionMode.Multiple;
                lb.Width = 275;
                
                
                //lb.Style.Add("ScrollTop",(int)ViewState["ScrollTop"]);
                
                //This is how the page picks up the Double Click event of the control
                lb.Attributes.Add("onDblClick", Page.ClientScript.GetPostBackEventReference(lb, ""));                ViewState["SelectedValue"] = lb.SelectedValue;
                ViewState["Click"] = 0;
                up.ContentTemplateContainer.Controls.Add(lb);

                tc.Controls.Add(up);
                tr.Cells.Add(tc);
                tblMain.Rows.Add(tr);

                tr = new TableRow();
                tc = new TableCell();
                
                
                //Add To Filter List Button
                Button btnOrgHierAddToFilterList = new Button();
                btnOrgHierAddToFilterList.Click += new EventHandler(btnOrgHierAddToFilterList_Click);
                btnOrgHierAddToFilterList.ID = "btnOrgHierAddToFilterList";
                btnOrgHierAddToFilterList.Text = "Add To Filter";
                btnOrgHierAddToFilterList.CssClass = "BtnStyle";
                tc.Controls.Add(btnOrgHierAddToFilterList);

                tr.Cells.Add(tc);

                tc = new TableCell();

                //Undo Drill Button.
                Button btnUndoDrill = new Button();
                btnUndoDrill.Click += new EventHandler(btnUndoDrill_Click);
                btnUndoDrill.Text = "Undo Drill";
                btnUndoDrill.ID = "btnOrgHierUndoDrill";
                btnUndoDrill.CssClass = "BtnStyle";
                btnUndoDrill.Visible = false;
                tc.Controls.Add(btnUndoDrill);

                tr.Cells.Add(tc);
                tblMain.Rows.Add(tr);

                tr = new TableRow();
                tc = new TableCell();
                tc.ColumnSpan = 2;


                //Error Label
                TextBox lbl = new TextBox();
                lbl.CssClass = "CtrlStyle";
                lbl.ForeColor = Color.Red;
                lbl.TextMode = TextBoxMode.MultiLine;
                lbl.Width = 200;
                lbl.Height = 200;
                lbl.ID = "lblOrgHierCtl_Error";
                lbl.Visible = false;
                tc.Controls.Add(lbl);

                tr.Cells.Add(tc);
                tblMain.Rows.Add(tr);

                this.Controls.Add(tblMain);

                base.CreateChildControls();
                VerifyPropertyValues();
                //Only want to do this once.
                if (lb.Items.Count == 0)
                    LoadInitialValuesIntoListBox(lb);