added some files

MainWindow.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2024, My Name <my@email.address>
+ * All rights reserved. Distributed under the terms of the MIT license.
+ */
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+
+#include <MenuItem.h>
+#include <Window.h>
+
+
+class MainWindow : public BWindow
+{
+public:
+							MainWindow();
+	virtual					~MainWindow();
+
+	virtual void			MessageReceived(BMessage* msg);
+
+private:
+			BMenuBar*		_BuildMenu();
+
+			BMenuItem*		fSaveMenuItem;
+};
+
+#endif