add (simple) archutils tree and AppInstance class

stepmania/src/archutils/Win32/AppInstance.cpp

@@ -0,0 +1,24 @@
+#include "../../../stdafx.h"
+#include "AppInstance.h"
+
+AppInstance::AppInstance()
+{
+	/* Little trick to get an HINSTANCE of ourself without having access to the hwnd ... */
+	TCHAR szFullAppPath[MAX_PATH];
+	GetModuleFileName(NULL, szFullAppPath, MAX_PATH);
+	h = LoadLibrary(szFullAppPath);
+	/* h will be NULL if this fails.  Most operations that take an HINSTANCE
+	 * will still work without one (but may be missing graphics); that's OK. */
+}
+
+AppInstance::~AppInstance()
+{
+	if(h)
+		FreeLibrary(h);
+}
+
+/*
+ * Copyright (c) 2002 by the person(s) listed below.  All rights reserved.
+ *
+ * Glenn Maynard
+ */

stepmania/src/archutils/Win32/AppInstance.h

@@ -0,0 +1,21 @@
+#ifndef APP_INSTANCE_H
+#define APP_INSTANCE_H
+
+/* Win32 only: get an HINSTANCE; used for starting dialog boxes. */
+class AppInstance
+{
+	HINSTANCE h;
+
+public:
+	AppInstance();
+	~AppInstance();
+	HINSTANCE Get() const { return h; }
+};
+
+#endif
+
+/*
+ * Copyright (c) 2002 by the person(s) listed below.  All rights reserved.
+ *
+ * Glenn Maynard
+ */