✔ 最佳答案
MFC is short for Microsoft Fundation Class. MFC is a library that put many of the Windows API in C++ classes so that programmers can perform a lot of operations by calling the MFC. MFC handles almost all computer functions, e.g., disk IO, network access, data, drawing and image, and low level operation such as device and memory management.
VB.net and Microsoft C# work closely with the .NET framework which has almost everything for most programming needs. Microsoft is shifting its emphasis from MFC to .NET framework.
I have not heard of ALT.