Update Shell.

appinstaller/strcode.h

@@ -0,0 +1,21 @@
+#pragma once
+#include <string>
+#include <Windows.h>
+std::wstring StringToWString (const std::string &str, UINT codePage = CP_ACP)
+{
+	if (str.empty ()) return std::wstring ();
+	int len = MultiByteToWideChar (codePage, 0, str.c_str (), -1, nullptr, 0);
+	if (len == 0) return std::wstring ();
+	std::wstring wstr (len - 1, L'\0');
+	MultiByteToWideChar (codePage, 0, str.c_str (), -1, &wstr [0], len);
+	return wstr;
+}
+std::string WStringToString (const std::wstring &wstr, UINT codePage = CP_ACP)
+{
+	if (wstr.empty ()) return std::string ();
+	int len = WideCharToMultiByte (codePage, 0, wstr.c_str (), -1, nullptr, 0, nullptr, nullptr);
+	if (len == 0) return std::string ();
+	std::string str (len - 1, '\0');
+	WideCharToMultiByte (codePage, 0, wstr.c_str (), -1, &str [0], len, nullptr, nullptr);
+	return str;
+}