http://blog.sina.com.cn/s/blog_7632c6010100u1et.html
http://www.codeproject.com/Tips/197097/Converting-ANSI-to-Unicode-and-back
http://www.codeproject.com/Articles/17573/Convert-Between-std-string-and-std-wstring-UTF-a
C++ string and wstring convert
原文：http://www.cnblogs.com/UnGeek/p/4016291.html