Gerald:

This would require some extra coding but you could pre-create specific properties to exactly match the names of the Fields in the table, sort-of like a data Object, similar to the following:

WITH THIS
 IF File(.DataBaseName+".dbc")
   IF !USED(.DataBaseName+"!"+.TableName)			
      USE (.DataBaseName+"!"+.TableName) IN 0 SHARE
   Else
       Select (.TableName)
   Endif
   .nFields = aFields(.aTableInfo,.TableName)		
   * create Properties with identical names to match fields...
   For x = 1 to .nFields
     .AddProperty(.aTableInfo(x,1),'')
   Next
 Else
   Messagebox("Missing Table, databases...cannot continue!")
   RETURN .F.
 Endif
 Select (.TableName)
ENDWITH

...now, whether you populate them all or not, they will never be Unknown as they have been initialized.

HTH,