Update Shell.

appinstaller/raii.h

@@ -0,0 +1,10 @@
+#pragma once
+#include <functional>
+typedef struct raii
+{
+	std::function <void ()> endtask = nullptr;
+	raii (std::function <void ()> pFunc = nullptr): endtask (pFunc) {}
+	~raii () { if (endtask) endtask (); }
+	raii (const raii &) = delete;
+	raii (raii &&) = delete;
+} destruct;