Deshabilitar boton Cerrar en winforms en Visual Basic.NET

Aqui les dejo este codigo que encontre navegando por Internet, este codigo lo ponen debajo de Public Class:

Dim _enabledcerrar As Boolean = False
     _
    Public Property enabledcerrar() As Boolean
        Get
            Return _enabledcerrar
        End Get
        Set(ByVal value As Boolean)
            If _enabledcerrar <> value Then
                _enabledcerrar = value
            End If
        End Set
    End Property
    Protected Overrides ReadOnly Property CreateParams() As System.Windows.Forms.CreateParams
        Get
            Dim cp As CreateParams = MyBase.CreateParams
            If _enabledcerrar = False Then
                Const CS_NOCLOSE As Integer = &H200
                cp.ClassStyle = cp.ClassStyle Or CS_NOCLOSE
            End If
            Return cp
        End Get
    End Property