Control Object Properties
DisableOnEmpty Auto-disable list when empty
   
Description This property can be set to have the system automatically disable a list style control (List box, list view, or drop box) if the list contents are empty -- that is there are no potential selection for the user to select. Once the list is populated (with at least one entry), the list box will be re-enabled.

This setting is independant of the 'Enabled property. That is, if the list box is already forcably disabled, adding entries to the list will not cause the list to be re-enabled.

   
Default 0 -- the list will not be automatically disabled
   
Used by DROP_BOX LIST_BOX LISTVIEW