how to create Control picture on registrion page

[Kevin]

Hi guys,

This control is designed to prevent the flooding by the register robots,
basically once an user entering the registration page, in order to register,
he need to enter the characters display in the control picture in order to
register. Is it hard to implement?

 

[Karl Seguin]

They are called captcha, which I imagine now that you know the name, you'll
be able to easily find out more information.

Here's a bunch of links to get you going:
http://www.codeproject.com/aspnet/CaptchaImage.asp
http://www.captcha.net/
http://www.lanapsoft.com/products.html

karl