i tried in this way, in my baseclass i put a value "anychange=.t." in the interactive change event.

in my form, the init i public the anychange and save anychange = .f.

if i press add then anychage = .t. and once i save i set bact the anychange to .f. again, but then, the save button still always enabled,

beside i put this code at the readmethod for the save button

if anychange
This.enabled=.t.
Else
This.enabled=.f.
Endif

But still not function,

anything wrong??