Event Handling an Abstract Class - vb.net

Question

Basically, I have a custom child form class which has events that will be passed to the parent. In the custom child form, I have a declaration of a "MustInherit" class that inherits the DevExpress User Control Class.
The reason for this, is I have many user controls that derive from this base class, and the child form can have an instance of any one of these controls, and doesnt care which. The only requirement is that the child form can handle the same events from each type of control the same way.
Some watered down code snippets(still pretty long unfortunately):
'''Inherited Class
Public Class ChildControlInheritedClass
'A Button Click event that starts the chain of events.
Private Sub btnMoveDocker_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnConvertToTab.Click
OnMoveToDocker(Me, New ChildGridMoveArgs(Me))
End Sub
End Class
'''Base Class
Public MustInherit Class ChildControlBaseClass
Inherits DevExpress.XtraEditors.XtraUserControl
Public Class ChildGridMoveArgs
Inherits System.EventArgs
Public Sub New(ByVal _ChildControl As ChildControlInheritedClass)
ChildControl = _ChildControl
End Sub
Public ChildControl As ChildControlInheritedClass
End Class
Public Event MoveToDocker(ByVal sender As Object, ByVal e As ChildGridMoveArgs)
Protected Overridable Sub OnMoveToDocker(ByVal sender As Object, ByVal e As ChildGridMoveArgs)
'''Once this RaiseEvent is fired, nothing happens. The child form is oblivious.
RaiseEvent MoveToDocker(sender, e)
End Sub
End Class
'''Child Form Class
Public Class ChildForm
Private WithEvents cgChild As ChildControlBaseClass
Public Property ChildGrid() As ChildControlInheritedClass
Get
Return cgChild
End Get
Set(ByVal value As ChildControlInheritedClass)
RemoveHandler cgChild.MoveToDocker, AddressOf cgChild_MoveToDocker
cgChild.Dispose()
cgChild = Nothing
cgChild = value
AddHandler cgChild.MoveToDocker, AddressOf cgChild_MoveToDocker
End Set
End Property
Public Event MoveToDocker(ByVal sender As Object, ByVal e As ChildControlInheritedClass.ChildGridMoveArgs)
Public Sub cgChild_MoveToDocker(ByVal sender As Object, ByVal e As ChildControlInheritedClass.ChildGridMoveArgs)
RaiseEvent MoveToDocker(sender, New ChildControlInheritedClass.ChildGridMoveArgs(cgChild))
End Sub
End Class
Public Class frmMain
Private Sub OpenNewWindow()
Dim frm As New ChildForm
Dim chld As New ChildControlInheritedClass
frm.ChildGrid = chld
frm.Show()
End Sub
End Class
In a nutshell, thats how I made the child form and how everything is suppose to work. But when I press the button in the inherited child control, the event only gets as far as the base class and never traverses the RaiseEvent into the child form thats suppose to handle the event.
Am I even in the ballpark here?
Thanks for reading!

Answer 1

You forgot to add your event handle by using AddHandler or Handles identifier. See below using the Handles cgChild.MoveToDocker identifier.
Public Class ChildForm
...
Public Sub cgChild_MoveToDocker(ByVal sender As Object, ByVal e As ChildControlInheritedClass.ChildGridMoveArgs) Handles cgChild.MoveToDocker
RaiseEvent MoveToDocker(sender, New ChildControlInheritedClass.ChildGridMoveArgs(cgChild))
End Sub
End Class