DirectX 9.0 SDK October Update
The DirectX 9.0 SDK – (October 2004) contains the FINAL release of the DirectX 9.0c Runtime and all DirectX software required to create DirectX 9.0 compliant applications in C/C++, and C#.
Primary areas of concentration for this Summer Update have been with the Direct3D Extension Library (D3DX), Graphics Samples, Tools and documentation. The included developer runtimes and the DirectX Redistributable have also been updated to include the latest updates (DirectX 9.0c).
Here are the download links: Release Notes, SDK, Extras, Symbols.