Tab Panel with DropDown Menu

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ASP.NET

I am Developing a Website where the TabContainer will be there with two TabPanel.
But when I click on TabPanel Header then one menu should get displayed, from where I can choose the appropiate options to be open.
Like

Users    Reports  Tansaction         Master tools
                 >Movement Report
                 >Stock Report
                 >Customer Report

When I choose any of the option then the particular page should open.

I wrote the following code to bring tabs

<asp:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0"
           Height="454px" Width="741px" >
           <asp:TabPanel runat="server" HeaderText="Explore" ID="TabPanel1">
           </asp:TabPanel>
           <asp:TabPanel ID="TabPanel2" runat="server" HeaderText="Report">
           </asp:TabPanel>
 </asp:TabContainer>

but I don't know the next part of the code.
Please help me.
what way to choose, what control need to be implemented.
please help.