If you install and then run an application or game that requires the app, you might receive an error message such as 'The program can't start because d3dx9_35.dll is missing from your computer. However, your computer includes a more recent version of Direct X. Some applications and games require DirectX 9 (End-User Runtime Web Installer) for PC. The latest version of the Microsoft Windows Gaming API delivers Microsoft's powerful new High-Level Shader Language (HLSL) and features its most-advanced suite of design tools for the development of rich multimedia elements such as full-spectrum color graphics, video, 3D animation, and enhanced audio capabilities. The app includes security and performance updates, along with many new features across all technologies, which can be accessed by applications using the DirectX APIs.

Microsoft DirectX 9 (End-User Runtime Web Installer) 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.

Direct x 12 windows 8.1