vs2013编译VC++源码，错误：
error MSB8031: Building an MFC project for a non-Unicode character set is deprecated. You must change the project property to Unicode or download an additional library. See http://go.microsoft.com/fwlink/p/?LinkId=286820 for more information.
解决方案：
从微软官网下载安装包vc_mbcsmfc.exe，然后装了就OK了。
出现这种情况，我们仔细读一下错误提示:
打开上面的网址：
错误 1 error MSB8031: Building an MFC project for a non-Unicode character set is deprecated. You must change the project property to Unicode or download an additional library. Seehttp://go.microsoft.com/fwlink/p/?LinkId=286820for more information. C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.CppBuild.targets 376 5 HostMSPaint
下载Visual Studio版本对应的文件 安装即可