Hi Peter,

>THIS.ENABLED=IIF(THISFORM.MyProperty=.T.,.T.,.F.)
>THIS.ENABLED=IIF(SetActiveOnOff,.T.,.F.)

Just a comment, but if the second and third of your iif()'s are .T. and .F. you probably don't need an IIF:

THIS.ENABLED = THISFORM.MyProperty
THIS.ENABLED = SetActiveOnOff

And put a not in front if it you pass .F. then .T.