can I call my Java application at the start up of some other application?

Actually I want to call my java application when a user starts a browser say Internet Explorer.My application will prompt the user for authentication and if authentication fails the browser would not be opened.In other words the user would be allowed to execute a process only upon authentication.

In Unix Operation system we can give execute permissions to users for each and every program.I want to do the same thing in windows operating system.