Event and delegates

[MrNorth]

Jus wanted to make sure I understood events and delagates correctly, I created this very silly test program (asp.net)

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim MyBell As New Bell()
        Dim myE As EventArgs
        Dim mypic As New Piccolo()
 
        AddHandler MyBell.Ring, AddressOf mypic.Responding_OnRing
        MyBell.OnRing(myE)
 
    End Sub
 
End Class
 
Public Class Bell
    Public Event Ring As EventHandler
 
    Public Overridable Sub OnRing(ByVal e As EventArgs)
        RaiseEvent Ring(Me, e)
    End Sub
 
    
End Class
 
Public Class Piccolo
    Public Sub Responding_OnRing(ByVal sender As Object, ByVal e As EventArgs)
 
    End Sub
End Class

I have two classes, the bell and the piccolo (hehe)

* I define a standard event delegate called "Ring" in the Bell
class

* I create a method that raises the event (OnRing)

* Then I create Piccolo class which should respond to the event

* I define an event handler method (Responding_OnRing)

* And finally attach the event to the piccolo objects eventhandler


Is this the preferred way to do it? What if I wanted to write "on the way" on the webpage?? Do I have to write a new delegate that is capable of returning a string, instead of the standard EventHandler delegate? I tried to define a new delegate that handles return values but it failed when I tried to create the event, am I thinking wrong about this? Shouldn't event handlers be capable of returning values? In this case I want to piccolo to re

Public Delegate Function MyEventHandler(ByVal sender As Object, ByVal e As EventArgs) As String

Whats up with the "MyBell.OnRing(myE)"... why do I have to pass an EventArg? Which one should I pass? In the code I create a new! I do not fully understand this part... care to explain?



kind regards
Henrik - trying to learn all about events and delegates in asp.net