| Name | Description | |
|---|---|---|
 | OnExit | Is called at system shutdown if the add-in was loaded at system startup! |
| OnInit | Is called if the add-in is to be loaded at system start-up . |
| OnInitGui | Called by the framework if the user interface was initialized and the add-in can modify the user interface. Is only called if the add-in is loaded at system startup! |
| OnRegister | Is called once when a new add-in is selected. |
| OnUnregister | Is called once, when the add-in is removed from the system. |