| Name | Value | Description |
| kEventCanceled | 515 | Canceled: Return this code if you want Inventor's native 'cancel' or 'fail' behaviour. |
| kEventHandled | 513 | Handled: Return this code if Inventor should now bypass its native behaviour. |
| kEventNotHandled | 514 | Not Handled: Return this code if Inventor should carry on with its native behaviour. |