The methods created by the Form Wizard support multiuser access to the class instances. The locking strategy in a multiuser environment works on the following basis.
An instance is not locked until an update is started.
At this point, the edition on the locked instance is compared to the edition of the instance at its initial read (that is, when the form was loaded for display).
If the editions are the same, the update continues. If the editions differ, implying that some other user has already updated this instance, the update is rejected.
If an update is rejected, a message is displayed informing you of the situation. The display is then refreshed with the updated instance, which you can then update in the normal manner.