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| ArcObjects namespaces > DataSourcesRaster > ESRI.ArcGIS.DataSourcesRaster > Interfaces > IR > IRasterDataManagementEvents Interface > IRasterDataManagementEvents.OnEvent Event (ArcObjects .NET 10.4 SDK) | 
Performs operation on the raster data management event.
[Visual Basic .NET] Public Event OnEvent As OnEventEventHandler
[C#] public event OnEventEventHandler OnEvent
[C++]
HRESULT OnEvent(
  BSTR EventName,
  VARIANT vParam
);
[C++]
Parameters EventName [in] EventName is a parameter of type BSTR vParam [in] vParam is a parameter of type VARIANT