DirectX provides access to the capabilities of your display and audio cards, which enables programs to provide realistic three-dimensional (3-D) graphics and immersive music and audio effects.
DirectX enables the program to easily determine the hardware capabilities of your computer, and then sets the program parameters to match.
This allows multimedia software programs to run on any Windows-based computer with DirectX compatible hardware and drivers and ensures that the
multimedia programs take full advantage of high-performance hardware.