You can enrich Windows with audio, Media Control Interface (MCI), and joystick capabilities by creating Windows drivers for these multimedia devices. The audio, MCI, and joystick interfaces available through Windows extends the environment by offering a standard set of devices and capabilities. By developing multimedia device drivers, you can customize and extend the system environment to include your specific devices. The samples for multimedia devices include driver sources, testing and installation applications, header files, and documentation describing the key features of the drivers.