Hello all,

I've some good knowledge on C++ console coding and am reading Chapter 5 of the book C++-GUI-Programming-with-Qt-4-2nd Edition. For a reason I'd like to be familiar with OpenGL.

Using this link, I went for learning it and downloaded a portable type of cmake-3.9.3-win64-x64 and ran the executable file of it and using the tutorial built the solution using VS 2017 win x64 successfully.

In the tutorial, it says: "A black window should appear".
But when I run playground.exe, two windows appear: one console black window and one dark blue larger window with the title of Playground. And the same outcome when running the project using VS.

I have some questions:

1- Is what I've done until now OK?
2- Is it right if I start learning OpenGL with the knowledge I have for now?
3- Is that tutorial a good resource for starting learning OpenGL from the basic for the first time, or should I choose a book instead?

Tanks you so much.