I’m using Microsoft Visual Web Developer 2005 Express Edition (fantastic program defiantly worth using over web matrix) and I want to no where can I find the class that creates the regular expressions valuator that you can add to a web page to enter a regular expressions into and set the target for a text box that you want to use the regular expression for when validating it's contents? The reason I want to no this is i want to see by looking at the code how it works, how it can take any regular expression and understand how to use it. I am hoping to make a flash version of it but will need to look at how the code for it works to create a flash equivalent