can't find d3dx11.h

　　D3DX is not considered the canonical API for using Direct3D in Windows 8 and later and therefore isn't included with the corresponding Windows SDK. Investigate alternate solutions for working with the Direct3D API. For legacy projects, such as the Windows 7 (and earlier) DirectX SDK samples, the following steps are necessary to build applications with D3DX using the DirectX SDK:

　　1、在https://www.microsoft.com/en-us/download/details.aspx?id=6812下載DirectX SDK，而後運行安裝。

　　2、設置環境變量DXSDK_DIR=C:\Program Files (x86)\Microsoft DirectX SDK (June 2010)

　　3、在Visual Studio 2015中右鍵工程名，選擇屬性->VC++目錄

　　　　1,選擇「全部配置」，「全部平臺」下拉選項

　　　　2，設置「包含目錄」爲「$(IncludePath);$(DXSDK_DIR)\Include;","庫目錄」爲「$(LibraryPath);$(DXSDK_DIR)\Lib\x86;",點擊」應用「

　　　　3,選擇平臺爲「x64」，庫目錄設置爲「$(LibraryPath);$(DXSDK_LIB)\Lib\x64;"，點擊"應用」

　　另外任何用到d3dx11.h的地方，必須顯式地包含d3d11.h和dxgi.h，以確保你使用的是最新版本。移除DXGIType.h，由於其已經不存在於Windows SDK，DirectX SDK版本與最新的winerror.h衝突。