cObject
---cUIObject
------DfBaseObject
---------DfBaseWindow
------------DfBaseUIWindow
---------------DfBaseControl
------------------DfBaseList
---------------------DfBaseForm
------------------------DfBaseEntry
---------------------------DfBaseComboBoxEntry
------------------------------ComboEntry
DfBaseComboBoxEntry is an abstract class used to combine the capabilities of the Entry and ComboForm classes in a single class. Its subclasses dbComboForm and dbCodeComboForm should be used for sub-classing and instantiation.