如何下载Direct3D9Ex

其实就是DirectX june_10月版本，下载链接如下

DirectX Software Development Kit

错误：安装报错“S1023"

若要解决此问题，必须在安装2010年6月版DirectX SDK之前卸载所有版本的Visual C ++ 2010 Redistributable。您可能安装了以下一种或多种产品：

• Microsoft Visual C++ 2010 x86 Redistributable
• Microsoft Visual C++ 2010 x64 Redistributable

您可以使用“控制面板”中的“添加或删除程序”来卸载产品。或者，您可以从管理员命令提示符运行以下命令：

MsiExec.exe /passive /X{F0C3E5D1-1ADE-321E-8167-68EF0DE699A5}

MsiExec.exe /passive /X{1D8E6291-B0D5-35EC-8441-6616F567A0F7}

卸载Microsoft Visual C ++ 2010 Redistributable产品后，您可以安装2010年6月的 June 2010 DirectX SDK。
安装2010年6月版DirectX SDK后，您可以重新安装最新版本的Visual C++ 2010 Redistributable Package。

英文原版：

Error Solution:

"S1023" error when you install the DirectX SDK (June 2010)

To resolve this issue, you must uninstall all versions of the Visual C++ 2010 Redistributable before installing the June 2010 DirectX SDK. You may have one or more of the following products installed:

• Microsoft Visual C++ 2010 x86 Redistributable
• Microsoft Visual C++ 2010 x64 Redistributable

You can use Add or Remove Programs in Control Panel to uninstall the products. Or, you can run the following commands from an administrator command prompt:

MsiExec.exe /passive /X{F0C3E5D1-1ADE-321E-8167-68EF0DE699A5}

MsiExec.exe /passive /X{1D8E6291-B0D5-35EC-8441-6616F567A0F7} 

After uninstalling the Microsoft Visual C++ 2010 Redistributable products, you may install the June 2010 DirectX SDK.

After installing the June 2010 DirectX SDK, you may then reinstall the most current version of the Visual C++ 2010 Redistributable Package.