Abstract base class for user events.
You can send arbitrary user events via the UserEvent application provided with asterisk. A user event by default has the attributes channel and uniqueId but you can add custom attributes by specifying an event body.
To add your own user events you must subclass this class and name it corresponding to your event.
If you plan to send an event by UserEvent(VIPCall) you will create a new class called VIPCallEvent that extends UserEvent. The name of this class is important: Just use the name of the event you will send (VIPCall in this example) and append "Event".
To pass additional data create appropriate attributes with getter and setter methods in your new class.
Example:

            public class VIPCallEvent : UserEvent
            {
            	 private string firstName;
            	 // Constructor
            	 public VIPCallEvent()
            	 {
            	 }
            	 // Property
            	 public string FirstName
            	 {
            		 get { return this.firstName; }
            		 set { this.firstName = value; }
            	 }
             }
            

To send this event use UserEvent(VIPCall|firstName: Jon) in your dialplan.
The UserEvent is implemented in apps/app_userevent.c.
Note that you must register your UserEvent with the ManagerConnection you are using in order to be recognized.

public class UserEvent : ManagerEvent

Public Class UserEvent
	Inherits ManagerEvent

public ref class UserEvent : public ManagerEvent

type UserEvent =  
    class
        inherit ManagerEvent
    end