I need a regex that matches a string containing 6 alpha, 2 alphanumeric and 3 OPTIONAL alphanumeric, upper and lower case. I need this for validating strings in ASP.net 2. Eg:. abcdefab345 abcdef22 abcdef5e abcdef3ee5e abcdef55asd abcdefr5 and should not match abcs abcd34d3 abcdef23f abcdefd abcdef  

OK. Stick with me here. It is going to take me a few to explain this. I am writing a small application in VB.NET. The ultimate task is to make a web browser, within a web browser. Basically, You open IE, FireFox, Safari, or whatever browser you like and go to the web application I am building. At the top of the web page, I have a tool bar, ...