From the post:
With the addition of 43 Million C++ code samples, our total corpus is now of 64 Million code samples. In addition to MSDN, stackoverflow and GitHub we have sourced code samples from specialist C++ domains like cppreference.com and cplusplus.com which gives developers a strong base of options to choose from. Now you have access to thousands of code samples for CRT (C runtime libraries), STL (standard template library) and various other open source C++ libraries like Boost, Direct3D, OpenCV etc. from within Visual Studio.