In Visual Studio 2012 (C++ environment), for a Win32 console application, I need to include a new header file to my project. I tried copying the files in the project\'s location
You should add the path to that header to the additional include directories under C/C++ in your project settings. Afterwards, just #include "iGraphics.h"
where you need it.
Don't just move header files around, and don't add existing headers to your project for no good reason. This way, you can easily change versions by just specifying a different folder.