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copied!<p>I would strongly recommend using UTF-8 internally in your application, using regular old <code>char*</code> or <code>std::string</code> for data storage. For interfacing with APIs that use a different encoding (ASCII, UTF-16, etc.), I'd recommend using <a href="http://www.gnu.org/software/libiconv/" rel="noreferrer">libiconv</a>, which is licensed under the LGPL.</p> <p>Example usage:</p> <pre><code>class TempWstring { public: TempWstring(const char *str) { assert(sUTF8toUTF16 != (iconv_t)-1); size_t inBytesLeft = strlen(str); size_t outBytesLeft = 2 * (inBytesLeft + 1); // worst case mStr = new char[outBytesLeft]; char *outBuf = mStr; int result = iconv(sUTF8toUTF16, &str, &inBytesLeft, &outBuf, &outBytesLeft); assert(result == 0 && inBytesLeft == 0); } ~TempWstring() { delete [] mStr; } const wchar_t *Str() const { return (wchar_t *)mStr; } static void Init() { sUTF8toUTF16 = iconv_open("UTF-16LE", "UTF-8"); assert(sUTF8toUTF16 != (iconv_t)-1); } static void Shutdown() { int err = iconv_close(sUTF8toUTF16); assert(err == 0); } private: char *mStr; static iconv_t sUTF8toUTF16; }; iconv_t TempWstring::sUTF8toUTF16 = (iconv_t)-1; // At program startup: TempWstring::Init(); // At program termination: TempWstring::Shutdown(); // Now, to convert a UTF-8 string to a UTF-16 string, just do this: TempWstring x("Entr\xc3\xa9""e"); // "Entrée" const wchar_t *ws = x.Str(); // valid until x goes out of scope // A less contrived example: HWND hwnd = CreateWindowW(L"class name", TempWstring("UTF-8 window title").Str(), dwStyle, x, y, width, height, parent, menu, hInstance, lpParam); </code></pre>

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