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spam is a huge problem on the internet even for web applications spammers will often create automated systems to send unwanted messages through forms on your pages to prevent this many websites use capture images these are images that contain text that a human can read but that canamp;#39;t be easily read by an automated system in the following lessons you will create a capture image using the classes in the system.drawing namespace to begin open the dotnet expert project from your sample files folder and open capture.aspx in design view once complete this page will contain a working captcha system switch to source view now and examine the img tag on this page the capture image does not yet exist but it will be created by your code and retrieved from the capture image folder next open the capture image folder and open capturehandler.cs this is an http handler you learned about http handlers in lesson 8.5 this http handler will output the capture.jpg image that is being requested on th