For modern applications using Microsoft C++, you should use the lastest version of Visual Studio available from Microsoft, which can be downloaded using the following link.
Download Latest Visual Studio Compiler
You should download only the one that corresponds to the version you will be using when taking the course.
COM Fundamentals II
was written for the Visual C++ 6 which was more than 20 years ago.
The code should still run using the Microsoft Visual Studio 2019 C++ Compiler.
Differences between procedures for the two versions are noted in the instructions.
Differences between the C++ compilers is commented in the code provided in the lessons and exercises.