InfoPath Dev

Hi, Help, please. How can I run code by pressing Enter in an InfoPath Web Form? For example, I introduce some text in a textbox and press enter and InfoPath runs the code. I want the same effect of clicking a button (Click Event). Is that possible? If so, how? Thanks in advanced.

 Add a Changed event to the field(s) that should run the code. Right click the field in the data source task pane, select Programming, and add a changed event (on after change for older versions of IP).