Protected Overrides Sub Dispose(ByVal disposing As Boolean)
      If originalImage IsNot Nothing Then originalImage.Dispose()
      If secondImage IsNot Nothing Then secondImage.Dispose()
 
      MyBase.Dispose(disposing)
   End Sub

Dim ctrl As MyPictureBox = DirectCast(Me.Panel1.Controls(0), MyPictureBox)
 
      ctrl.Image.Dispose()
      ctrl.Dispose()

   Private Sub MyPictureBox_Disposed(ByVal sender As System.Object, ByVal e As _
     System.EventArgs)
      Dim ctrl As MyPictureBox = DirectCast(sender, MyPictureBox)
 
      ctrl.Image.Dispose()
   End Sub