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Controls functionality of the label engine.
Use the ISupportErrorInfo method InterfaceSupportsErrorInfo to determine if the object supports extended error information. If the object supports extended error info, VC++ developers should use the OLE/COM IErrorInfo interface to access the ErrorInfo object. Visual Basic developers should use the global error object Err to retrieve this extended error information.
| Interfaces | Description | 
|---|---|
| IActiveViewEvents (esriCarto) | Provides access to events that occur when the state of the active view changes. | 
| ISupportErrorInfo (esriSystem) | |
| ITrackingLabelDraw | Provides access to methods for drawing dynamically changing labels. | 
| ITrackingLabelEngine | Provides access to properties and methods for controlling the tracking label engine used for dynamically changing labels. | 
| ITrackingLabelEngine2 | Provides access to properties and methods for controlling the tracking label engine used for dynamically changing labels. |