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。