This option does not apply to this tutorial. However, with optimistic locking one cannot be certain that the update will succeed because another user could lock the record first. The user information is kept in a separate system database, and access is controlled on each object in the system for instance by table or by query. Jet originally started in as an underlying data access technology that came from a Microsoft internal database product development project, code-named Cirrus. FlexGrid: fill from recordset.
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