On Enter

I have an asp.net page built to pull history from a SQL 2000 database.
I have the user enter a number in a text box and then click on the button to find & display the history.
Everything happens when they click on the button.
How do I make it happen if they hit the Enter key after typing in their number?
I want it to work both ways...hitting Enter or clicking the button.
Thanks!Reffer to this post :
http://www.vbforums.com/showthread.php?t=346036
Excellent!
This worked for me!
Thanks!