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Message: [QUOTE="Old Wolf, post: 2510966"] std::wstring does not specify any encoding type or any character set. The most common implementations of std::wstring use Unicode character set, and either UCS-4, UCS-2 or UTF-16 encoding. But this is not a requirement. std::string is appropriate for UTF-8. But you must remember that functions like size() and find() will apply to the encoded bytes, not to the decoded version. If that was your issue, then you could also say that std::wstring is not appropriate for any Unicode encoding, because of combining characters (ie. the string length won't match the number of display characters). Of course the correct answer is that you should engage your brain when manipulating Unicode strings, and be aware of these issues. Many applications do indeed use std::string for UTF-8 processing. [/QUOTE]