Disable the Close box on a form

This is purely a VB.NET version of what Griff posted

 Public Const CS_NOCLOSE As Integer = &H200

 Protected Overrides ReadOnly Property CreateParams() As System.Windows.Forms.CreateParams
        Get
            Dim params As CreateParams = MyBase.CreateParams
            params.ClassStyle = CS_NOCLOSE
            Return params
        End Get
    End Property