The correct CAPTCHA answer is stored as a session variable and validated with server validation where you validate that the session variable value matches the input value in the form. It should be added automatically by form builder.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.