DirectX® 7.0a delivers fast performance for DirectX-enabled games and other rich media software programs, and provides support for the latest generation of 3-D graphics acceleration hardware. This package updates your system from DirectX 7.0 to DirectX 7.0a, providing improved force feedback performance and the best compatibility with today's input devices. Like DirectX 7.0, this version also offers excellent graphics, video, 3-D animation, and surround sound.
For additional information about DirectX, please read the Microsoft DirectX, Technology Overview. (This site is in English.)