Getting a DTE from a C++ ATL Package

Hi --

This is driving me totally nuts.  I am trying to integrate my tool written in non-managed C++ into Visual Studio 2012 via a custom package that I initially generated from the Package Wizard.  I need to get hold of a DTE and DTE2 object and am not sure how to do this.  This is ATL C++ code, and pretty much all the guiding samples I find are either using C#/VB or are so old that they don't work any more.

Can anyone familiar with this help me out here?

Thanks.

Mike