'Type image text' -validation, how?

Hi,

I have been searching for a image validation. You know, like in hotmail. Use must type 6 digits code from the image. How would I do that? I've heard sthing about GD library but not sure if i can use the whole library.

Any tutorials or help?

There is one in the php section of my site, http://imheretohelp.net

~Phil~

Also Velox Letum has one in the 'Post a PHP snippet' on here...

http://codingforums.com/showthread.php?t=73869