DisableFieldEx

To disable or enable a field within an active form, use DisableFieldEx or the pre-tab version, DisableField.

To disable a field (make read-only) UIMaster.RUICenter.DisableFieldEx, , , true

To enable a field UIMaster.RUICenter.DisableFieldEx, , , false


 * 1) - Normally the name of the tab, but could also be the index (if you are looping through the tabs in a form) or the id of the tab (from the database)
 * 2) - Normally the name of the segment, but could also be the index (if you are looping through the segments in a tab) or the id of the segment(from the database)
 * 3) - Normally the name of the field, but could also be the index (if you are looping through the fields in a segment) or the id of the field(from the database)
 * 4) true / false - True - field is disabled, False - field is enabled


 * You can not enable a field that is marked read-only when designing the form.
 * You can not enable a field which is based on a table level formula