How-to create auto-updating fields

Hello, I'm having a slight problem with user controlled fields on the front
panel. I'm using controls in LabVIEW 8.0, and my problem is that when a
user enters a new value into a numeric control field, the control does not
update and pass that value throughout the rest of the code unless the user
presses the <enter> key while the field is still selected. Seems as
though there should be an easy fix.Thanks in advance.