Question : Using 'Dirty' on a subform

I have a form (frmEncounter) with a subform subEncounter.
data from subEncounter is saved to the table Encounter

I want to use 'Dirty' to determine if there has been any changes to the data on the subform.
If so, I want to 'undo' these changes.

How can I do this?
Not sure of the syntax nor of where to place this code? on the form or sumform.

Answer : Using 'Dirty' on a subform

you can place the code on the Sumform,
for example "before update" of the subform,
I think this should do it:

if me.dirty=true then
cancel = true
endif

jaffer