Event that fires indicating the logical start of a sequence of triad moves.
| Name | Type | Description |
| CoordinateSystem | Matrix | Returns a Matrix object indicating the triad's current position in model space. |
| Context | NameValueMap | Input NameValueMap object that can be used to determine the context of why the event fired. |
| HandlingCode | HandlingCodeEnum | Output HandlingCodeEnum that indicates how you are handling the event. The value of this argument is currently ignored for this event. |