It may be of interest to read the response I got regarding comparing control types and the very small related thread.

I think this is a good example of using the response from variable.gettype
but in summary, the example corrected code is something like:-

        For Each ctrl As Control In Me.Controls
            If TypeOf ctrl Is System.Windows.Forms.Button Then
                Console.WriteLine("test   " & ctrl.GetType.ToString)
                ctrl.BackColor = Color.FromName("red")
            End If
        Next