In this step you will add a few standard HTML controls using markup.

1. First add some standard controls to your page.
2. In your Web application, add the following markup to add CheckBoxes, a DropDownList, RadioButtons, a Button, and a TextBox to the main content of  your page.

<ul class="formdecorator">

            <li>

                  <h3>TextArea</h3>

                  <asp:TextBox runat="server" ID="TextBox3" TextMode="MultiLine"></asp:TextBox>

            </li>

            <li>

                  <h3>Drop-down list of options&nbsp;&nbsp;&nbsp;

            <asp:DropDownList ID="DropDownList1" runat="server" Height="16px" Width="132px">

            <asp:ListItem Text="OptionA" Value="A"></asp:ListItem>

                <asp:ListItem Text="OptionB" Value="B"></asp:ListItem>

                <asp:ListItem Text="OptionC" Value="C"></asp:ListItem>

                <asp:ListItem Text="OptionD" Value="D"></asp:ListItem>

                <asp:ListItem Text="OptionE" Value="E"></asp:ListItem>

            </asp:DropDownList>

            <cc1:C1DropdownExtender ID="DropDownList1_C1DropdownExtender" runat="server"

                TargetControlID="DropDownList1">

            </cc1:C1DropdownExtender>

          

            </li>

            <li>

                  <h3>CheckBox</h3>

                  <input id="checkbox1" type="checkbox" /><label for="checkbox1">checkbox1</label>

                  <input id="checkbox2" type="checkbox" /><label for="checkbox2">checkbox2</label>

                  <input id="checkbox3" type="checkbox" /><label for="checkbox3">checkbox3</label>

                  <input id="checkbox4" type="checkbox" /><label for="checkbox4">checkbox4</label>

            </li>

            <li>

                  <h3>Radio</h3>

                  <input type="radio" name="radiobutton1" id="radio1" /><label for="radio1">radio1</label>

                  <input type="radio" name="radiobutton1" id="radio2" /><label for="radio2">radio2</label>

                  <input type="radio" name="radiobutton1" id="radio3" /><label for="radio3">radio3</label>

                  <input type="radio" name="radiobutton1" id="radio4" /><label for="radio4">radio4</label>

            </li>

            <li>

                  <h3>Button</h3>

                  <input type="button" name="button1" value="Submit" />

            </li>

      </ul>

Now you can add the corresponding extender controls.