To build a project using Visual Studio, you need to set all the include directories (which store the source code) that are located in the source folder.
- Go to the solution properties
- Select VC++ Directories
- In the Include Directories tab, set the required paths to the directories:

Demonstration: https://www.youtube.com/watch?v=gkDSImgfPus&t=30s
Map editor for 3DConsoleGame.