public class CallbackStateEventArgs : EventArgs
Public Class CallbackStateEventArgs Inherits EventArgs
The CallbackStateEventArgs class introduces the CallbackStateEventArgs.Chart property, which specifies the chart being processed in the event handler.
Note, that you don't need to create and use instances of the CallbackStateEventArgs class. Instead, CallbackStateLoadEventArgs and CallbackStateSaveEventArgs should be used. These objects are automatically created, initialized and passed to corresponding event handlers.