Beginner question : How to set page header

[beck]

How can I set the header shown of a asp page? (The label shown on the tab in the web browser) In the application I am looking at, it is always set to "main" and I want to change this.

[andreasblixt]

Programmatically, it's:
Page.Title = "My Website";

To change it in the .aspx file, it's in the first declaration:
<%@ Page CodeFile="Default.aspx.cs" Inherits="Page_Default"
Language="C#" Title="My Website" %>