Does ANYONE out there have Custom Code for Payment Processing for Authorize.Net?

I just need something that can get the Order Number, Order Total to pass along with my unique Access Information to pass to Authorize.net.

Would need just the standard stuff to be able to process a Credit Card transaction.  Customer Billing address, card #, CCV Code, Shipping Address, you know the standard stuff.

This problem has been dogging me since Day One!

I know there are some REALLY smart people out in this community who have tackled this already.

Would deeply appreciate any help that anyone could provide!

Thanks!