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Captcha – basics

Posted by: RcBuilder  /   Category: Bitmap / Captcha / GDI+ / Graphics / image / ImageFormat / SOURCE CODE / Stream   /   No Comments

Captcha - basics the logic behind the captcha is simple - you have to create an handler generates some value(such as numbers or letters) using GDI+ tech it creates an image containing the above value and write it directly to the response stream, in addition - it update the current session with the created value for later.

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