Sams Teach Yourself ATL Programming in 21 Days quickly empowers you to create your own small, fast COM components quickly and easily using the Active Template Library. Written by a professional developer who applies ATL in his everyday development, the book provides guidance and direction, leading you through a progression of topics that begin with the basic building blocks of COM programming, and ending with in-depth discussions of the more commonly used features of the Active Template Library. Topics include creating your first ATL COM object, understanding the ATL architecture, using the ATL app wizard, working with ATL helper classes, handling ATL errors, using C++ templates, using multithreading, creating ATL applications, automation with ATL, combining ATL and OLE dB for database access, and using ATL with MTS (transactions).