The DirectX 9.0 SDK enables developers to build outstanding games and graphics applications by taking full advantage of DirectX technologies built into Microsoft Windows. Updated every two months, the DirectX SDK provides additional C/C++ and Managed libraries, samples, tools and documentation over and above the Microsoft Platform SDK. This release includes changes to D3DX library, graphics samples, tools, and documentation updates. Updated developer runtimes and the DirectX Redistributable (DirectX 9.0c) are also included.