How to implement DIG in C++ ???

I'm trying to make an SMTP server to send emails.
The problem is that I have to know where to send the data (until now it just relays to some fixed smtp servers on the net).
I therefore need to implement some kind of dig (I was told something like MX...???)
Could you explain me how to do it?
And if possible post some code (that works on Windows)?

.: Snyke :.
LVL 1
SnykeAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

_nn_Commented:
Following URL seems to have what you need :
http://www.codeguru.com/internet/DnsResolver.html

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
SnykeAuthor Commented:
Isn't there a lighter thing?
I just need something to get the MXs and this one gets everything, making my program really heavy...
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C++

From novice to tech pro — start learning today.