How do you want to "add" it? Cutelyst creates normal Qt projects (using CMake), you can simply open the CMakeList file in Qt Creator and it will be understood. If you specify path to your Cutelyst installation in build settings, you'll even be able to build the project from within Qt Creator.
@sierdzio
Hi,
After building cutelyst by cmake-gui and msvc2019_64
and "cmake --build . --target INSTALL --config Release" command in cmd
what is the next step?