Many IDEs offer the possibility of having different syntax highlighting colors for preprocessor directives and preprocessor headers. In
#include <Windows.h>
#include "gl_shader.hpp"
They set different colors for #include and the headers <Windows.h> and "gl_shapper.hpp"
#define is another preprocessor directive
In C::B, I haven't found a way to differentiate the highlighting colors for the preprocessor directives and headers