Capture Image Link of a Captcha in HTML

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C#

HTML

Hi,
I am going to write a BOT. It uses a WebBrowser control in C#.
The problem is that sometimes the website sends the user one captcha like:


Here the program has to send the image to someone else to enter the characters. The problem is that my program has no access to the image, unless its link be discovered. I found the code related to captcha, but there is no link here:

<script>
	var RecaptchaOptions = {
	theme: 'custom',
	lang: 'ir',
	custom_theme_widget: 'recaptcha_widget'
};
</script>
<div id="recaptcha_image"></div>
<span class="recaptcha_only_if_image">نوشته:</span>
<input type="text" id="recaptcha_response_field" name="recaptcha_response_field" />
<script type="text/javascript" src="http://api.recaptcha.net/challenge?k=6LfdmAsAAAAAAPb_3Zn53hlv5fR3oUS0FeXc7a9h&lang=en"></script>

What do you think I have to do?

daveauld wrote:

The only reason you want to write a bot, is so you can start hijacking emails and creating spam........other than that just type what you see.
It is highly unlikely that anyone on this site would be willing to give you any assistance given what you are trying to do.
So, i suggest you try somewhere else. This question is worse than; "Here is my homework, please do it for me".
Have a nice day.

Maybe you use BOTs for sabotaging, but I do not. The BOT is used to make it easier for the user.
Please do not state your opinion if it does not help to solve questions.