EventHandler Not getting called

Question

This might be a dumb question, but I just can't get this to work.

Using a 3rd party C# library, I need to get live data via an Event Handler, It goes something like this:

Library.KEvents bnoEvent = new Library.KEvents();
envtsList.Add(bnoEvent);
/* 
Some code to set bnoEvent up
*/
bnoEvent.OnEvent += new Library._IKEventsEvents_OnEventEventHandler(bnoEvent_OnEvent);

The function bnoEvent_OnEvent is never executing.

The demo code I got (in VB) looks like this:

If KEventsA Is Nothing Then
    Set KEventsA = New Library.KEvents
End If  
/* Setting KEventA up */

The method that is being called is:

Private Sub KEvents_OnEvent(data As KType)

This drives me CRAZY! I cannot find any connection between this function and the KEventA object! How does it know?

I know it is pretty hard to debug without knowing how this library actually works, but is there any major things I should be doing while registering for events beside declaring the function and adding it as a new eventHandler?

Answer 1

Either use the Addhandler Statement or the Handles clause on the event sub. That is how VB sets up delegates.

If KEventsA Is Nothing Then
 KEventsA = New Library.KEvents
 Addhandler KEventsA.OnEvent, AddressOf KEvents_OnEvent
End If  

Or

'must use this for declarations for this way
Private WithEvents KEventsA As New Library.KEvents
'then the method
Private Sub KEvents_OnEvent(data As KType) Handles KEventsA.OnEvent

C#

Library.KEvents KEventsA = new Library.KEvents;
KEventsA.OnEvent += new EventHandler(KEvents_OnEvent);