CAPTCHA Problem help!

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how can i make the captcha refresh autometically ???? please help

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this is
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Drawing"%>
<%@ Import Namespace="System.Drawing.Imaging"%>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        Random Rand = new Random();
        int intNum = Rand.Next(100000, 999999);

        Bitmap Bmp = new Bitmap(90, 50);

        Graphics Gfx = Graphics.FromImage(Bmp);
        Gfx.Clear(Color.White);

        Font Fnt = new Font("Fandango", 13, FontStyle.Bold);

        Gfx.DrawString(intNum.ToString(), Fnt, Brushes.Red, 15, 15);

        int RandY1 = Rand.Next(0, 50);
        int RandY2 = Rand.Next(0, 50);
        Gfx.DrawLine(Pens.Black, 0, RandY1, 90, RandY2);

        RandY1 = Rand.Next(0, 50);
        RandY2 = Rand.Next(0, 50);
        Gfx.DrawLine(Pens.Black, 90, RandY1, 0, RandY2);

        RandY1 = Rand.Next(0, 50);
        RandY2 = Rand.Next(0, 50);
        Gfx.DrawLine(Pens.Black, 0, RandY1, 90, RandY2);

        Bmp.Save(Response.OutputStream, ImageFormat.Gif);
        Session["VerfiNum"] = intNum;
    }
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">

<title>CaptchaImage</title>
</head>
<body>
</body>
</html>

Posted 16-Jul-11 6:31am

basma.rashad

Updated 16-Jul-11 6:59am

RaviRanjanKr

v2

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Comments

Uday P.Singh 16-Jul-11 13:30pm

why would you do that? leave this to user to change the captcha

basma.rashad 16-Jul-11 13:54pm

iam sorry i don't understand u ??,, i mean if the user enters a wrong captcha it will automatically change

shakil0304003 16-Jul-11 21:18pm

Unclear!!! what do you want?

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OriginalGriff · Answer 1 · 2011-07-16T21:20:00

Solution 1

Why create your own, which is quite likely to be machine readable? Why re-invent the wheel?
Instead, why not use Recaptcha[^] instead? It's free, it's secure, and it helps to get books into electronic format, so it shows you care to your users (those that know about these things, anyway)

Posted 16-Jul-11 21:20pm

OriginalGriff