Subscribe functionality in regular form

My business user wants to create a poll for our customers using the normal Forms module, but they also want to have a checkbox on the form that allows the customer to sign up for a particular mailing list they already have setup in Sitefinity.   How can I create a form that acts like a normal form, but also has the subscribe functionality and how do I link that to the correct mailing list?

Hello,

This forum is duplicate with the following:

http://www.sitefinity.com/developer-network/forums/developing-with-sitefinity-/subscribe-functionality-in-regular-form-7d1951a29108

Further information will be provided in the above one.

Regards,
Stefani Tacheva
Telerik