Microsoft DirectX is a group of technologies designed to make Windows-based computers an ideal platform for running and displaying applications rich in multimedia elements such as full-color graphics, video, 3D animation, and rich audio. DirectX 9.0 includes security and performance updates, along with many new features across all technologies, which can be accessed by applications using the DirectX 9.0 APIs. This release also resolves an issue with DirectX 9.0 where some multiplayer games or MSN Messenger may not work correctly. A number of minor bugs were also resolved.
It is unclear as to what is new or changed in this updated version of DirectX 9.