DirectX 11 is the latest graphics technology for Windows. It will be implement on Windows 7 with support wide varieties of Windows games and graphic display devices. In addition to richer images in general, you'll see the best gaming graphics possible.After making DirectX 10 available for windows Vista, Microsoft has released DirectX 11 with Direct3D 11 available for download as technical preview for public testing.
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As Windows 7/Direct3D 11 Technical Preview is part of DirectX SDK and contains Technical Preview of Direct2D, DirectWrite, DXGI 1.1. Good news is, it is not only available as Technical Preview but also as DirectX End-User Runtimes.
This DirectX11 contains the following new Direct features and tools:

• Technical Preview of Direct2D
• Technical Preview of DirectWrite
• Technical Preview of DXGI 1.1

However, DirectX 11 is supported on Windows 7 and Windows Vista only. The Windows XP users cannot install DirectX 11.
Download DirectX 11 Software Development Kit
Download DirectX 11 End-User Runtimes
Download DirectX 11 Web Installer