IBO 4.5a - FB 1.53 - Delphi 7

Dear Friends
Before post a record: how to know if that record was edited but not commited in another transaction, on the network?
In the IB_Database connection:
- autocommit=true, isolation=tiCommited, recversion=true, lockwait=false

I'm trying to avoid deadlock!

Thanks.
Hércules