This DirectX SDK release contains updates to tools, utilities, samples, Documentation, and runtime debug files for x64 and x86 platforms. This release also include a public pre-release of Microsoft Cross-Platform Audio Creation tool, Managed Direct Code (2.0 CLR), and DirectX 10.
It also continues to include the DirectX Runtime and Redistributable. For additional information please see Microsoft DirectX Developer Center along with reviewing the Readme for last-minute updates.
Download: DirectX SDK - (December 2005)