web control, hiding my other controls....

i have composite control which is very simple it has text-box and a link-button and when the user clicks on the link-button it displays the div and inside the div i have a data-grid control, in other words it works like a multi-column combo-box.

here is my question:

i drag and drop my control(my composite control) from the toolbar and underneath i have textbox and in the design time i dont see the textbox or any other control, it bascially hides... what do i have to do in order for other control to be visible?
 
example

<cc1:MultiColumnComboBox ID="MultiColumnComboBox1" runat="server">
<asp:TextBox ID="TextBox8" runat="server"/> <br>
<asp:Label ID="Label1" runat="server" Text="Label"/>

i dont see the textbox and label.....what im missing?

here is my source code:

// composite control starts...

1    protected override void RenderContents(System.Web.UI.HtmlTextWriter writer)
2                {
3                EnsureChildControls();
4                      AddAttributesToRender(writer);
5                      writer.AddAttribute(HtmlTextWriterAttribute.Cellpadding, "0");
6                      writer.AddAttribute(HtmlTextWriterAttribute.Cellspacing, "0");
7                      writer.AddAttribute("onmouseleave", string.Format("onLostFocus(\'{0}\',\'{1}\');", DivId, GetCtrlsToHideIds()));
8                      writer.RenderBeginTag(HtmlTextWriterTag.Table);
9                      
10                     writer.RenderBeginTag(HtmlTextWriterTag.Tr);
11                     writer.RenderBeginTag(HtmlTextWriterTag.Td);
12                     txtData.RenderControl(writer);
13                     btnDownArrow.RenderControl(writer);
14               //if (this.ViewState["ValidatorEnabled"] != null && (bool)this.ViewState["ValidatorEnabled"] == true)
15               //{
16               //    writer.Write("&nbsp;");
17               //    rfData.RenderControl(writer);
18               //}
19                     writer.RenderEndTag(); //'Td
20                     writer.RenderEndTag(); //'Tr
21                     
22                     writer.RenderBeginTag(HtmlTextWriterTag.Tr);
23                     writer.RenderBeginTag(HtmlTextWriterTag.Td);
24                     
25                     Unit width;
26                     Unit heigth;
27                     
28                     if (this.ViewState["ComboBoxListWidth"] == null)
29                     {
30                           width = new Unit(200); //'default width of the combo box in pixles
31                     }
32                     else
33                     {
34                           width = (Unit)this.ViewState["ComboBoxListWidth"];
35                     }
36                     
37                     if (this.ViewState["ComboBoxListHeight"] == null)
38                     {
39                           heigth = new Unit(200); //'default width of the combo box in pixles
40                     }
41                     else
42                     {
43                           heigth = (Unit)this.ViewState["ComboBoxListHeight"];
44                     }
45                     
46                     
47                     writer.Write("&lt;div style=\'Z-INDEX:100;BACKGROUND:White;POSITION: absolute;display:none;width:" + width.ToString() + ";" + "height:" + heigth.ToString() + ";" + DivCSS + "\' id=" + DivId + "&gt;"); //    '" onmouseleave=" & String.Format("onLostFocus('{0}','{1}');>", DivId, GetCtrlsToHideIds))
48                     
49                     dgSearch.RenderControl(writer);
50                     writer.Write("&lt;/div>");
51                     writer.RenderEndTag(); //'Td
52                     writer.RenderEndTag(); //'Tr
53                     
54                     writer.RenderEndTag(); // Table
 

1    private string DivId
2                {
3                      get
4                      {
5                            return "div" + this.ClientID;
6                      }
7                }

 private string DivCSS {
 get {
   System.Text.StringBuilder css = new System.Text.StringBuilder();
   string xScrolling;
   object yScrolling;
   css.Append("BORDER-RIGHT: black 0px solid;");
   css.Append("BORDER-TOP: black 0px solid;");
   css.Append("BORDER-BOTTOM: black 0px solid;");
   css.Append("BORDER-LEFT: black 0px solid;");
   if (this.ViewState("HorizontalScrolling") == null || !(this.ViewState("HorizontalScrolling"))) {
     xScrolling = "none";
   } else {
     xScrolling = "auto";
   }
   if (this.ViewState("VerticalScrolling") == null || !(this.ViewState("VerticalScrolling"))) {
     yScrolling = "none";
   } else {
     yScrolling = "auto";
   }
   css.AppendFormat("overflow-x:{0};", xScrolling);
   css.AppendFormat("overflow-y:{0};", yScrolling);
   return css.ToString;
 }
}

if you see my above code, i make sure that i have style DISPLAY:NONE

writer.Write("<div style=\'Z-INDEX:100;BACKGROUND:White;POSITION: absolute; display:none; width:" + width.ToString() + ";" + "height:" + heigth.ToString() + ";" + DivCSS + "\' id=" + DivId + ">");  
 
thanks looking forward to see the solution.