How CAPTCHAs Usually Work?

rickydonlad New Member Posts: 4	How CAPTCHAs Usually Work? Mar 11, 2011 23:39:15 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by rickydonlad on Mar 11, 2011 23:39:15 GMT Could anyone explain how captchas work? Is there any particular format of captcha or we can use any type of captcha to our website?