About Delegate function, what does DMouseEvents_MoveNotifyEventHandler mean?

  Sub AddMouseHandlers(ByVal ModView As ModelView)

        Dim swmouse As Mouse = ModView.GetMouse

        AddHandler swmouse.MouseMoveNotify, AddressOf mousemovenotify

    End Sub

    Sub RemoveMouseHandlers(ByVal Modview As ModelView)

        Dim swmouse As Mouse = Modview.GetMouse

        RemoveHandler swmouse.MouseMoveNotify, AddressOf mousemovenotify

    End Sub

    Function Mousemovenotify(ByVal x As Integer, ByVal y As Integer, ByVal wparam As Integer) As Integer

        'Hey the mouse moved. Do something bout it

    End Function

it is important to avoid memory leaks that when you no longer need the event, that you call RemoveMouseHandlers.

i always set a local variable to the class that is watching to determine if the event handler has been attached.

if attached then remove the handler upon class dispose

DO NOT LEAVE EVENT HANDLERS OPEN IN CLASSES