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GLFW is a free, Open Source, multi-platform library for OpenGL, OpenGL ES and Vulkan application development. It provides a simple, platform-independent API for creating windows, contexts and surfaces, reading input, handling events, etc.

Getting started is a guide for users new to GLFW. It takes you through how to write a small but complete program.

There are guides for each section of the API:

• Introduction to the API – initialization, error handling and high-level design
• Window guide – creating and working with windows and framebuffers
• Context guide – working with OpenGL and OpenGL ES contexts
• Vulkan guide - working with Vulkan objects and extensions
• Monitor guide – enumerating and working with monitors and video modes
• Input guide – receiving events, polling and processing input

The reference documentation provides more detailed information about specific functions.