VB2010 config file + custom sections

A kdo ve kako narediti custom sections v config datoteki?

    
Private Sub fmysql_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        '        Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)
        Dim config As System.Configuration.ConfigurationSection = System.Configuration.ConfigurationManager.GetSection("appsettings")
        config.CurrentConfiguration.Sections.Add("test", config)

skoraj vse možne kombinacije sem že probal, pa mi ni uspelo, razen v appsettings, ki je default section.

Torej kako recimo naredim section korenje znotraj configuration sectiona, kako potem to prebiram in manipuliram z temi podatki...