https://resources.arcgis.com/en/help/arcobjects-net/componentHelp/0019/0019000000qp000000.htm
IGPLayer.AreaOfInterest Property (ArcObjects .NET 10.1 SDK)
propertysdk
https://resources.arcgis.com/en/help/arcobjects-net/componentHelp/0019/0019000000qq000000.htm
IGPLayer.DataElement Property (ArcObjects .NET 10.1 SDK)
propertysdk