'Declaration
 
Public Delegate Sub OnChangeEventHandler( _
   ByVal sender As Object, _
   ByVal eventArgs As OracleNotificationEventArgs _
) 

public delegate void OnChangeEventHandler( 
   object sender,
   OracleNotificationEventArgs eventArgs
)

Parameters

sender

The source of the event.

eventArgs

An OracleNotificationEventArgs object that contains the event data.

When you create an OracleLoaderErrorEventArgs delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see "Events and Delegates" in the .NET Framework SDK documentation.

Reference

OnChangeEventHandler Members
Devart.Data.Oracle Namespace