Update Settings Page.

appinstaller/strcode.h

@@ -1,6 +1,8 @@
 #pragma once
 #include <string>
 #include <Windows.h>
+#include <locale>
+#include <codecvt>
 std::wstring StringToWString (const std::string &str, UINT codePage = CP_ACP)
 {
 	if (str.empty ()) return std::wstring ();
@@ -19,3 +21,13 @@ std::string WStringToString (const std::wstring &wstr, UINT codePage = CP_ACP)
 	WideCharToMultiByte (codePage, 0, wstr.c_str (), -1, &str [0], len, nullptr, nullptr);
 	return str;
 }
+std::string WStringToUtf8 (const std::wstring& ws)
+{
+	static std::wstring_convert <std::codecvt_utf8_utf16 <wchar_t>> conv;
+	return conv.to_bytes (ws);
+}
+std::wstring Utf8ToWString (const std::string& s)
+{
+	static std::wstring_convert <std::codecvt_utf8_utf16 <wchar_t>> conv;
+	return conv.from_bytes (s);
+}