<DllImport("nome dll", CallingConvention:=CallingConvention.Cdecl)> _
        Private Shared Function nome funzione della dlle(ByVal callback As DeviceNotificationCallback, ByVal unused1 As UInteger, ByVal unused2 As UInteger, ByVal unused3 As UInteger, ByRef am_device_notification_ptr As IntPtr) As Integer
        End Function