>Hi,
>
>A customer mentioned to me that they would like to improve security of my ASP.NET application by adding the "capture" feature (this is what it sounded to me like on the phone). Has anybody done this feature? What is involved?
>
>TIA

It is called CAPTCHA. This is what you get on some websites that show you a distorted graphic of text and request you type in what you read. It tries to keep automated programs from accessing your site or certain functionality.

Some commercial versions of CAPTCHA type controls are available - Infragistics has one that I've used.

I assume there are open source versions as well.