DAO recordset add/edit

[adam]

Hi,

I have a subform and an unbound combobox in it whose
after update event writes data to subform's fields
according to comboxe's column values. I use
recordset.addnew all the time, but if the record is
created before, it should edit that record not create a
new one.

Is there a way to determine when the combobox afterupdate
event occurs, the record on the subform is a new record
or a pre-made record and edit or add data accordingly?

Thanks for help

Best regards.