I downloaded a trial version of DMX because I have a project to tweak and its all written in ultradev. I need to be able to send a error message or redirect a user if they try to edit an event(page) that they did not enter and I need to be able to send an error if an event date, time, or place has been already selected. Or there tutorials or snippets out there that would help me?

could you be a little more specific and provide information on what you are exactly trying to achieve.

Graham

Hi. In regards to what I'm doing I'll try to be a little clearer. I have an event calendar that allows users to "reserve" rooms. I would like to be able to tweak my code so that if users request a certain time for that date and location they will receive an error message or be redirected to an error page if that time has already been selected for that location on that date. Clearer? Let me know if you would like me to send the portion of code I think needs to be added to make this happen.
Thanks!