Locking data after entry
I'm having difficulty in uncerstanding how to lock data after it's entered so that it cannot be inadvertently (or maliciously) be changed.
I've read about "triggers" which will check a "Lock" field but I can't see how to arrange a script which will prevent the field from being modified. We have multiple users who need ongoing access to records and they need to be able to modify some fields but there are some fields which must not be changed once the correct data is entered.
Can anyone help?