ASP.NET MVC CAPTCHA implementation

Question

I am attempting to implement a Captcha on a partial view of a page in my application. I have the captcha being refrenced through web.config as a control. I have used the GenericHandler and Class file from this forum post: http://forums.asp.net/t/1871186.aspx/1

How can I reference the user's input if i am using a simple input tag? Should I use an HtmlHelper instead?

           <div class="captcha">
                <rhcap:Captcha ID="Captcha1" runat="server"></rhcap:Captcha>
                <input type="text" id="UserCaptchaText"><input/>
                <%= Html.TextAreaFor(m => m.UserCaptcha) %>
            </div>

            <%if(Captcha1.Text != /* How can get the users input here?*/ ) {
                  //display error

            }else{
                   //proceed
            }%>

Answer 1

Use NuGet and install Recaptcha for .NET (supports MVC as well)

http://nuget.org/packages/RecaptchaNet/

Documentation is on the site:

http://recaptchanet.codeplex.com/

There are other captchas:

http://captchamvc.codeplex.com/

EDIT:

This project has moved to GitHub https://github.com/tanveery/recaptcha-net