InfoPath Dev

Good Morning, I am trying to trigger a rule when a digital signature or signature item is signed. However no matter what I do, the rule does not trigger. I've tried using a blank document with nothing but a signature line item and it does not work either. If anyone could advise, it would truly be appreciated. Thanks and Regards,

Could you provide a sample of code behind? Would it open something like the send message section or would it only show something like the attached image? Nevermind found some code and it works the way my users require it. Thank you for your help! :)

Hello I'm looking to trigger C# code when the send email button is triggered in an Infopath 2010 Form. Would anyone be able to advise on how it would be done? Thanks and Regards,