http://blogs.msdn.com/pranab/archive/tags/Captcha+antispam+sharePoint+custom+field/default.aspxTags: Captcha antispam sharePoint custom fielden-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/pranab/archive/2008/12/09/sharepoint-2007-moos-wss-custom-captcha-antispam-field.aspxWed, 10 Dec 2008 01:48:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:9188106pranab14http://blogs.msdn.com/pranab/comments/9188106.aspxhttp://blogs.msdn.com/pranab/commentrss.aspx?PostID=9188106<P><FONT face=Verdana size=2>I saw a nice post in CodeProject (</FONT><A title=http://www.codeproject.com/KB/aspnet/CaptchaImage.aspx href="http://www.codeproject.com/KB/aspnet/CaptchaImage.aspx" mce_href="http://www.codeproject.com/KB/aspnet/CaptchaImage.aspx"><FONT face=Verdana size=2>http://www.codeproject.com/KB/aspnet/CaptchaImage.aspx</FONT></A><FONT face=Verdana size=2>) regarding CAPTCHA image control. I used the same code to create a Custom Field that will work like a CAPTCHA field for SharePoint. I tested it with Custom List and Blog Post suceessfully. You need to enable the session in the Web.Config file using enableSessionState="true" as it depends heavily on session. Here is how it looks like:</FONT></P> <P><A href="http://blogs.msdn.com/blogfiles/pranab/WindowsLiveWriter/SharePoint2007MOOSWSSCustomCAPTCHAAntisp_3C79/captcha.jpg" mce_href="http://blogs.msdn.com/blogfiles/pranab/WindowsLiveWriter/SharePoint2007MOOSWSSCustomCAPTCHAAntisp_3C79/captcha.jpg"><FONT face=Verdana size=2><IMG style="BORDER-RIGHT: 0px; BORDER-TOP: 0px; BORDER-LEFT: 0px; BORDER-BOTTOM: 0px" height=117 alt=captcha src="http://blogs.msdn.com/blogfiles/pranab/WindowsLiveWriter/SharePoint2007MOOSWSSCustomCAPTCHAAntisp_3C79/captcha_thumb.jpg" width=570 border=0 mce_src="http://blogs.msdn.com/blogfiles/pranab/WindowsLiveWriter/SharePoint2007MOOSWSSCustomCAPTCHAAntisp_3C79/captcha_thumb.jpg"></FONT></A><FONT face=Verdana size=2>&nbsp;</FONT></P> <P><FONT face=Verdana size=2>Here is the screenshot of the Solution Explorer:</FONT></P> <P><A href="http://blogs.msdn.com/blogfiles/pranab/WindowsLiveWriter/SharePoint2007MOOSWSSCustomCAPTCHAAntisp_3C79/soexplr.jpg" mce_href="http://blogs.msdn.com/blogfiles/pranab/WindowsLiveWriter/SharePoint2007MOOSWSSCustomCAPTCHAAntisp_3C79/soexplr.jpg"><FONT face=Verdana size=2><IMG style="BORDER-RIGHT: 0px; BORDER-TOP: 0px; BORDER-LEFT: 0px; BORDER-BOTTOM: 0px" height=322 alt=soexplr src="http://blogs.msdn.com/blogfiles/pranab/WindowsLiveWriter/SharePoint2007MOOSWSSCustomCAPTCHAAntisp_3C79/soexplr_thumb.jpg" width=278 border=0 mce_src="http://blogs.msdn.com/blogfiles/pranab/WindowsLiveWriter/SharePoint2007MOOSWSSCustomCAPTCHAAntisp_3C79/soexplr_thumb.jpg"></FONT></A><FONT face=Verdana size=2> </FONT></P> <P><FONT face=Verdana size=2>You can download the WSP file&nbsp;and the project in a zip file from <A class="" title="Code and WSP" href="http://blogs.msdn.com/pranab/attachment/9188106.ashx" mce_href="http://blogs.msdn.com/pranab/attachment/9188106.ashx">here</A>.</FONT></P><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9188106" width="1" height="1">Captcha antispam sharePoint custom field