MyConfigurator.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="MyConfigurator.ascx.cs" Inherits="Providers_TokenProviders_My_MyConfigurator" %>

<div class="dnnFormItem">
    <asp:label id="lblField" runat="server" text="Parameter" helptext="Enter a value"
        controlname="tbParameter" CssClass="dnnLabel" />
    <asp:TextBox ID="tbParameter" runat="server"></asp:TextBox>
</div>

MyConfigurator.ascx.cs

using Satrabel.OpenBlocks.Token;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Providers_TokenProviders_My_MyConfigurator : TokenConfigurator
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    public override void LoadSettings(System.Collections.Hashtable settings)
    {
        try
        {
            tbParameter.Text = (string)settings["parameter"];
        }
        catch (Exception)
        {
        }
    }

    public override System.Collections.Hashtable SaveSettings()
    {
        Hashtable settings = new Hashtable();
        settings["parameter"] = tbParameter.Text;
        return settings;
    }

    public override string getToken()
    {
        return "{{my parameter=\""+tbParameter.Text+"\" }}";
    }
}