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I want to make a form the essentially creates an invoice, but using some other related data as inputs or limits; In the process of adding items to the invoice, I need to reduce the items in another table. Since the user will enter several items at a time, I’d like to issue a “START TRANSACTION” when the form loads, and then do a “COMMIT” when the form updates. Thus, if they cancel the form, the other related tables (shown via subforms) would roll back to the previous values.
Can’t be done using bound forms. You could use temporary tables to store the data and then update the main tables. A bit of a kludge but I’ve done that in the past.
See the TempTables.MDB page at my website which illustrates how to use a temporary MDB in your app.