I want to put a textbox to the right of the last option button in an ASP option group:

<asp:TableRow ID="TableRowOptions" runat="server" Height = 22>
    <asp:TableCell ID="TableCell1" runat="server" Width="30%"></asp:TableCell>
    <asp:TableCell ID="TableCell2" runat="server">

        <asp:radiobuttonlist id="radio1" Font-Names="Arial" Font-Size="10pt" runat="server">
            <asp:listitem id="option1" runat="server" value="Display On Screen" />
            <asp:listitem id="option2" runat="server" value="Show Report" />
            <asp:listitem id="option3" runat="server" value="Export To File" />
        </asp:radiobuttonlist>
        
    </asp:TableCell>
</asp:TableRow>

What's the way to do this?