how to find user control page in accordian code behind

Question

Hello,

 

       i am useing accordian so how to find user control page .

 

 

<ajaxToolkit:AccordionPane id="accpan1" runat="server">

<Header>
<a href="#" class="href"><h4 style="margin-left: 100px;">Student Search</h4></a>
</Header>
<Content>
<asp:Panel ID="UserReg" runat="server" CssClass="toolbar">
<search:final ID="nn" runat="server"/>
</asp:Panel>
</Content>
</ajaxToolkit:AccordionPane>