This document describes all classes, functions, and files that make up the FlatUI library. This is intended to be used a reference for C++ programmers who are familiar with graphical user interfaces (GUIs).

The API reference is broken into the following sections:

FlatUI Core
- The core library that contains the functions that drive the GUI.
Common Widgets
- A collection of common widgets, such as sliders, scroll bars, and buttons.
Font Manager
- The classes and functions that are used by the library to manage fonts.