Event that fires when a model state is activated.
| Name | Type | Description |
| DocumentObject | Document | The Document object the model state is being activated within. |
| ModelState | ModelState | The model state that is being activated. |
| BeforeOrAfter | EventTimingEnum | Input EventTimingEnum indicating when the event is being fired. Notification is sent before and after the model state has been activated. |
| Context | NameValueMap | Input NameValueMap object that can be used to determine the context of why the event fired. No context information is provided for this event. |
| HandlingCode | HandlingCodeEnum | Output HandlingCodeEnum that indicates how you are handling the event. The value of this argument is currently ignored for this event. |