Most of the processing that occurs in an IIS application occurs in the event procedures for the application's webitems. You use these events to tell Visual Basic what to do when it receives a request from the browser for a particular element on a page. Visual Basic matches requests it receives to webitem events and runs any code it finds for the event procedures.
You use Visual Basic code to tell the webclass how to process requests. These are just a few of the things you can do in your event procedures: