Download the complete DirectX 9.0 SDK - (Summer 2003), which contains the DirectX 9.0b Runtime and all DirectX software required to create DirectX 9.0 compliant applications in C/C++, C#, and Visual Basic .NET.
Major components include: DirectX 9.0b system components (runtimes); DirectX 9.0 Application Programming Interface (API) Documentation for each of the DirectX core areas (written for C++, C#, or Visual Basic .Net developers); DirectX 9.0b headers & libraries; Sample applications and source code; miscellaneous tools and utilities.
Download the DirectX 9.0 SDK Extras for extra content, such as Japanese Docs, Symbol Files, Direct3D XFile Exporters, DirectShow DVD components, DirectPlay for PocketPC, and DirectMusic Producer.