By using events, all states (trigger monitor, interrupt input and so on) during device operation can be notified to the application program.
For event notification, it is possible to know what event occurred by the passed parameter, and then perform corresponding handling.
Message Notification
It is a method of executing the PostMessage function of Win32API from
the driver and notifying messages to the application.
It is an usual way for event notification.
For creating the handler for event notification, the method varies with
the development language being used.
This method cannot be used by applications without Window handle (console
application and so on).
How to create event message routine
Visual Basic .NET
Visual C#
Visual C++ (MFC)