These constants are used to determine how RDO manages update operations when the WillUpdateRows event is fired. The ReturnCode parameter is used to notify RDO about what your code did in the event procedure.
| Constant | Value | Description |
| rdUpdateSuccessful | 0 | The developer handled the update and was successful in doing so. |
| rdUpdateWithCollisions | 1 | The developer handled the update, was successful, but some rows produced collisions (batch mode only). |
| rdUpdateFailed | 2 | The developer attempted to handle the update, but encountered an error when doing so. |
| rdUpdateNotHandled | 3 | The developer did not handle the update, RDO should continue notifying, and if no one handles the update RDO should update the data itself. |