[RESOLVED] How can i use a captcha on my page

Hello sir,
I am using ASP. In register page, it want to ask for captcha code while registering. (captcha must be random)

Can anyone help me in this coding?

Thread moved from CodeBank forum (which is for you to post your code examples, not questions)

ASP or ASP.NET?

http://www.tipstricks.org/
http://www.u229.no/stuff/Captcha/

Here's what I use, it's not very secure at all!

1) Code:

<%
     Dim strCaptcha, pChar, pCount
     pChar = "0123456789"
     pCount = Len(pChar) 
     Randomize
     For i = 1 To 5
     strNumber = Mid(pChar, 1 + Int(Rnd * pCount), 1 )
     strCaptcha = strCaptcha & strNumber
     response.write("<img src='images/numbers/" & strNumber & ".gif' />")
     Next
     session("captcha")=strCaptcha
%>

Quote:

---

Originally Posted by knxrb

Here's what I use, it's not very secure at all!

1) Code:

<%
     Dim strCaptcha, pChar, pCount
     pChar = "0123456789"
     pCount = Len(pChar) 
     Randomize
     For i = 1 To 5
     strNumber = Mid(pChar, 1 + Int(Rnd * pCount), 1 )
     strCaptcha = strCaptcha & strNumber
     response.write("<img src='images/numbers/" & strNumber & ".gif' />")
     Next
     session("captcha")=strCaptcha
%>

---

With your coding i am getting output like this.
Attachment 67872
How can i fix this?

Have you created the image files (1.gif to 9.gif), and stored them in the relevant folder?

Like si_the_geek said, you need to either draw or get some number images and put them in the 'images/numbers' folder.
Here's some images if you want them:

But the captcha appears very easily to type by the user. Can i able to make it more difficult like captcha asked during registration in yahoomail.

Have you looked at post #3?