If you don't already know what threads are, then you should take the time to learn.
Latest C++ & MFC Articles - Page 32
Code to help driver developers locate and solve memory problems. The code includes checks for buffer overruns, double-frees, invalid memory accesses.
Learn about the kinds of .DLLs you can make using MFC and the advantages of each kind. Also learn how to create a .DLL and how to set up a client application to use it.
Learn about the problems that can arise when you use .DLLs. Also learn how these problems can be avoided.
This third part builds on the previous two by providing more coding examples and technical details.
How to write your own DllMain in an MFC Dll.
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Learn more about a few commonly used components and explore their utility and usages.
Make a RESTful call from a UWP app to the Azure management API, the same API the portal uses, to start and stop an app service.
Using VB Namespaces can help tremendously in achieving your goal of keeping your code organized.