Display checked items in combobox

[Peichung]

Hi,

I put a checkbox tree view in a combobox and I would like to see checked items displayed in the combobox's text.  However, with the codes I have, I only get selected item, not checked items:

    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <telerik:RadComboBox ID="RadComboBox1" runat="server" Height="200px" AllowCustomText="true" OnClientDropDownClosed="OnDropDownClosed" AutoPostBack="true">
        <ItemTemplate>
            <telerik:RadTreeView ID="RadTreeView1" runat="server" CheckBoxes="true" TriStateCheckBoxes="true" CheckChildNodes="true" >
            </telerik:RadTreeView>
        </ItemTemplate>
        <Items>
            <telerik:RadComboBoxItem Text="" Value="" />
        </Items>
    </telerik:RadComboBox>
    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="RadComboBox1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadComboBox1" />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
    </form>

[Peichung]

Problem solved.  Thanks,