Check for existence of a cookie

Working on re-coding our member login page from PHP to ASP. Previously, I checked for the existence of a cookie holding the access code. If it was set, then the code was retrieved and inserted into the request header as if it came from the form itself. If the code was still valid, the page is built accordingly. If it is no longer valid, the cookie is deleted and an appropriate message is displayed. If no cookie exists at all, the login form is displayed. This was done all in one php page using includes.
 
How do I check to see if a cookie is set in ASP? I've seen instructions for ASP.net, but I'm using standard ASP. Thanks Much

google:

asp -.net cookies