DirectX Features
- Since Windows Vista features a rewritten audio stack and does not inherit the Hardware Abstraction Layer for audio that was present under prior versions of Windows, there is no hardware acceleration of DirectSound and DirectSound3D APIs. DirectSound and DirectMusic are emulated entirely in software. As a result, hardware accelerated audio and 3D spatialization in games utilizing DirectSound3D is no longer supported.
- Direct3D Retained Mode (D3DRM) has been removed.
- DirectPlay Voice and DirectPlay's NAT Helper have been removed.
- Some DirectInput functionality (action-mapper UI) has been removed as well.
- DirectPlay has been deprecated.
- The DirectMusic kernel mode synthesizer that supplies the DirectMusic components with a high-resolution timer has been removed.
- Support for the DirectX 7 and DirectX 8 interfaces for Visual Basic 6.0 is not available on Windows Vista.
Read more about this topic: List Of Features Removed In Windows Vista
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