>There is a setting called ValidateRequest that you can set to turn this feature on and off. The setting is in Machine.config, web.config, and can be set in the @ Page directive.

Thanks, I will look for that.

>There is not an event hook for this, but it throws an HttpRequestValidationException that you can intercept in a Try/Catch block. I'm not too sure where to put the Try/Catch. You can also look for the error in the Global.asax Application_Error event.

The way I see it, it would probably be in the Global.asax. Other than that, I don't know where to put it in the higher hierarchy where we would be able to take control over it.