Release 10.1A: OpenEdge Development:
ADM Reference

AllFieldNames

This property is defined for all visual objects and returns a list of all widgets in the SmartObject’s frame. This list of widgets includes data fields that come back as part of the DisplayFields list and other objects such as buttons and fields that are not derived from an SDO, including rectangles and fields labels that are separate widgets with their own handles.

Data type: CHARACTER

Notes:

Read and Write.
For SmartDataFields, the logical name of the dynamic Lookup or Combo is returned in the AllFieldNames list along with its procedure handle in the AllFieldHandles list.