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# Qt for Windows Requirements

If you are using a binary version of Qt with Visual Studio 2005, you must first install the Visual Studio Service Pack 1 available here to avoid runtime conflicts.

To build Qt with Phonon on Windows, you require:

- Microsoft's DirectX Software Development Kit which can be downloaded here, and
- Microsoft's Windows Server 2003 R2 Platform SDK which is available here.

See also Known Issues in 4.4.2.

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