So i have learned most of what is on this site and i find myself wanting to expand. the code i write just works with the console and never goes any farther than that. I want to learn more about interfacing my programs with the computer/OS.
Find a graphics library, like DirectX, or SFML (which i'd highly recommend for beginners) and start coding with them. Or, start working with Qt, or wxWidgets, which provide really good utilities to create user interfaces.
Widgetry includes things like forms with pushbuttons, checkboxes, listboxes and other types of controls. It also includes windows with scrollbars, toolbars, menus, etc, etc. Any kind of control that is common among different programs.