The Image-Based CAPTCHA: Part 2

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Custom : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        lblError.Text = "";
    }

    protected void btnTest_Click(object sender, EventArgs e)
    {
        if (botDetector.IsValid)
            lblError.Text = "You are definitely a human.";
        else if (!botDetector.IsLocked)
            lblError.Text = "You are probably a bot.";
        else
            lblError.Text = "You are locked because of exceeding the failed attempts limit.";
    }
}