Question

In continuation of this question. Does VB.NET supports virtual events?

Answer 1

Does VB support the CLR notion of a virtual event

No. This is something we’ve looked into supporting but did not meet our current bar in the given language cycle.

Does VB support the idea of a hierarchy which customizes events

Yes. You can use the Custom event syntax to allow for hierarchy controlled eventing.

MustInherit Class Base     Public Custom Event Event1 As EventHandler         AddHandler(ByVal value As EventHandler)             AddEvent1(value)         End AddHandler          RemoveHandler(ByVal value As EventHandler)             RemoveEvent1(value)         End RemoveHandler          RaiseEvent(ByVal sender As Object, ByVal e As System.EventArgs)             RaiseEvent1(sender, e)         End RaiseEvent      End Event      Protected MustOverride Sub AddEvent1(ByVal value As EventHandler)     Protected MustOverride Sub RemoveEvent1(ByVal value As EventHandler)     Protected MustOverride Sub RaiseEvent1(ByVal sender As Object, ByVal e As EventArgs)  End Class