参考：http://rg4.net/archives/851.html

环境：windows8.1

        最近想看看directx的demo。从微软那边下载了directx sdk，安装时说是缺少.net frame work3.5。网上说是windows8.1的系统盘已经有.net frame work 3.5的功能，得安装上才行。

步骤：

      1、利用windows8.1的镜像在cmd中输入安装。netframework的命令：dism.exe /online /enable-feature /featurename:NetFX3 /Source:F:\sources\sxs

       2、重新安装sdk

安装完成后发现里面的资源很丰富，directx9、directx10和directx11的例子都有。主要还有我想看的PRT和HDAO（高级环境光遮蔽）

注意点：

安装错误：

Setup failed.

Errors were encountered during installation of redistributable packages. Please close all open programs and try running setup again. If problems persist, contact DirectX Developer Support.

Error Code: S1023

解决方法：

go to Control Panel>Program & Features and uninstall programs like this:
Microsoft Visual C++ 2010 x86/x64 redistributable – 10.0.(number over 30319)

Windows8.1下安装Driectx sdk