Has anyone ever figured out a simple way to find out who the MAIN recipient is in Outlook?

I've done a lot of searching and from what I can tell there is no easy way. What Outlook gives you instead is a Recipient list that you have to iterate through and then I don't know what. It was too convoluted and messy for me to dive deeper into it. In the end I'm not even sure it was possible to figure out anything more than a list of the CC's and everyone else who got the e-mail.

Did I miss something or is it really that difficult? This is something I've wanted to put in my software for a long time and haven't been able to figure out.

Thanks.