error MSB8031: Building an MFC project for a non-Unicode character set is deprecated. You must chang

编译报错：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.

现象：vs2013编译程序，实现excel和sql server2008数据写读。有些代码只支持unicode，有些有只能使用多字节。所以，单纯的切换字符集没用。总有一方要报错。

解决方法：

http://go.microsoft.com/fwlink/p/?LinkId=286820

照着错误提示中的官网连接，去下载MFC MBCS DLL组件，安装之后就可以了。