Changed since the definition in the base class (IOW if a child class alters the prop in its definition it is altered).
Just play around with the definitions:

CLEAR
loA = CREATEOBJECT('myclass')
?PEMSTATUS(loA,'comment',0)
loA.COMMENT = 'mäh'
?PEMSTATUS(loA,'comment',0)
*loa.myprop=0
?PEMSTATUS(loA,'myprop',0)
loA.RESETTODEFAULT('myprop')
?PEMSTATUS(loA,'myprop',0)

DEFINE CLASS myclas AS CUSTOM
*comment = 'muh'
 myprop = .T.
ENDDEFINE

DEFINE CLASS myclass AS myclas
*comment = 'muh'
 myprop = .T.
ENDDEFINE

Agnes
>I have a question about using PEMSTATUS(,,0) ... which is supposed to indicate that a property has changed.
>
>Changed since when?
>
>It seems like all of my custom properties for a form (added using "New Property" -- and not changed thereafter) show up as true. What use is this?