Response method which is provided by the page class?

[Hashem]

I need to create a button that will be offered to generate a printable invoice. This will reformat the webpage specifically for printing the buying tickets information. I am only allowed to use one webpage, and somehow everything else on the page must disappear so that only the Printable Invoice shows. How can I do this? I was told that "The trick is to use the Response method, which is provided by the Page class (more precisely, it is provided by a parent class named System.Web). What you show on the screen is managed by the System.Web object and using the Response method you can put anything you want in there. "