CAPTCHA creation

Question

How can one create a captcha application as a field in the form say registration form...?

Answer 1

This should get you started.

Answer 2

you can get from here http://www.captcha.net/

Answer 3

go to recaptcha website,register your website there ,they will give dll ,add that reference to your project and include that wherever you want in your web form.

something like this(i am not sure of this code..),

<recaptcha:control runat='server'.....>
..
</recpatcha>