What about the war between point and comma as decimal/thousand separator? A joke comparing to dates war, but...

I cannot imagine a single reason to write a user interface in C++/MFC instead of C#. C#/WinForms let you write code at an higher level, not caring too much to low level implementation detais, but also allows you to handle yourself the windows messages if you really need such a low level control of your code. "Yes, but with C++ I can write high performance code, faster than c#" (not really true actually) If you find a part of your code too slow when written in c#, you can write a c++ dll for that specific algorithm you need to run faster and use it from a .Net program (with interoperability and/or managed c++) I really see no space for MFC to be the right tool of the job. C++ can be for some jobs, but not for writing UI, IMHO