An Event Handler is a subroutine that executes code for a given
event. Look at the following code: When will the code above be
executed? The answer is: "You don't know..." The Page_Load event
is one of many events that ASP.NET understands. The Page_Load
event is triggered when a page loads, and ASP.NET will
automatically call the subroutine Page_Load, and execute the
code inside it: Note: The Page_Load event contains no object
references or event arguments! The Page_Load subroutine runs
EVERY time the page is loaded. If you want to execute the code
in the Page_Load subroutine only the FIRST time the page is
loaded, you can use the Page.IsPostBack property. If the
Page.IsPostBack property is false, the page is loaded for the
first time, if it is true, the page is posted back to the server
(i.e. from a button click on a form): The example above will
write the "The date and time is...." message only the first time
the page is loaded. When a user clicks on the Submit button, the
submit subroutine will write "Hell