The handle of the previous widget in the tab order of a field group relative to the specified widget.
Data type: HANDLE
Access: Read-only
Applies to: BROWSE widget, BUTTON widget, COMBO-BOX widget, CONTROL-FRAME widget, EDITOR widget, FILL-IN widget, FRAME widget, RADIO-SET widget, SELECTION-LIST widget, SLIDER widget, TOGGLE-BOX widget
The PREV-TAB-ITEM attribute returns the Unknown value (?) for a widget that is at the beginning of the tab order in a field group.