ATL and Dual Interfaces (Page 1 of 2) George Shepherd and Scot Wingo Microsoft's Active Template Library provides template implementations of many of the most common COM idioms. However, to work with the more advanced COMisms in ATL, you'll want to understand what ATL is doing behind the façade of wizardry. Scot is a cofounder of Stingray Software. He can be contacted at mfc_faq@stingsoft.com. G..