Although some methods and objects aren’t supported through IISAM drivers, the IISAM drivers do support transactions on external databases that support transactions. You can use the Transactions property of a Database, Connection, or Recordset object to determine if DAO transaction methods are supported. The following table lists the transaction methods that are available on supported databases.
| DAO transaction method | Description |
| BeginTrans | Begins a transaction on the selected data source. |
| CommitTrans | Completes a transaction on the selected data source by saving changes. |
| Rollback | Undoes a transaction on the selected data source. |