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Adding CAPTCHA (or similar) to ISAPI dll in Delphi 2007

Hello,
I am tasked with creating a public website with a security check (image validation) on the very first page to restrict spam bots access. I am using Delphi 2007 with IW9.0.30 to create a ISAPI dll (as I like iSAPI better than CGIs but am open right now). I have everything done except the validation part because this is the first time I am working with JavaScript inside ISAPI. I found JCap (http://www.archreality.com/jcap/ - based on the CAPTCHA engine - http://www.captcha.net/) ) to be easier to follow and would like to use it instead of CAPTCHA itself. Has anyone done something similar to this/used Captcha/reCaptcha with ISAPI before? If not, would you happen to know of some resources/documentation/samples that can help me out? Would it be easier to code for the check as a CGI than ISAPI?

We need this done fast and would appreciate any info that can help me out.

Thanks a lot.
VJ

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vrijesh

ASKER

Thank you developmentguru. Yes this is what I need to do. While I was thinking about it in terms of "plugging" something in, the way you laid it out so clearly gives me some new ideas to try. I do have a set of 50 or so images already created which I could use like you mentioned. Only thing remaining is to dyamically pull up the image and validate it on the button click.

Thanks once again. Will post what I come up with soon.

vrijesh

ASKER

Thank you developmentguru. A look from the outside was just what I needed. When I was done, there was really nothing much to it. And the folks love having something built in-house. Thanks once again.