I know how to get the html code from a website but on craigslist when you click Reply and it shows the options to reply including an email address how can I access this by code? I can extract the email address from a large string even if it is scraped off.

I am trying to write a program with the webbrowser control to automate some processes. If I click on reply I want to get the email address and load it in my email program by code so I can then reply to the ad. But I cannot see that popup window by code. I tried using one of those window handle spy programs but it does not see it as a separate window that I know iff.