Download demo(include Lanap.BotDetect.dll )
this CAPTCHA also can work without cookies.
see more details on site: http://captcha.biz/asp.net-captcha.html
(the cookieless doesn't supported in DNN)
enjoy it.
Lanap.BotDetect.CaptchaHandler
夔博
转载于:https://www.cnblogs.com/nevernet/archive/2010/03/03/1677418.html
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