enableFields modifies the SENSITIVE attribute of the appropriate field objects in the form buffer. If set to FALSE, text-oriented field objects are effectively prevented from receiving any input by the action of the default web.output control handler. For more information on these effects, see the code provided in install-path\src\web\support\webinput.p.

enableFields only sensitizes field objects for input for which you have set the Enable property to Yes (the default) in the field object Property Sheet in the AppBuilder.