how to generate the barcode USING SOME FUNCTIONALITY

<div>i HAVE ONE REQUIREMENT LIKE THIS PLZ TELL ME THE CODE HOW TO GENERETE QR CODE PLZ HELP ME ,i DON'T AN IDEA ABOUT GENERETE QR CODE USING ASP.NET</div> <div> </div> <div><html></div> <div><head runat="server"></div> <div><body></div> <div> </div> <div>COUPOUN TYPE:<asp:RadioButton ID="RadioButton1" runat="server" ForeColor="#006600" GroupName="coupon" Text="QR Code" /></div> <div> <div></div> <div>Coupon value type:<asp:DropDownList ID="DropDownList1" runat="server" Height="24px" style="color: #0000FF; background-color: #66CCFF" Width="147px"></div> <div>  &n ...