If your VS not 2003 and you cant open .vcproj files, then open .cpp files with notepad, copy code, chose Visual C++ Projects->Win32->Win32 Project.
Application type: Windows application. In Additional options case Empty project. In Source Files add new item: C++ File(.cpp).
And paste coped code from aa.cpp.
In Resource Files add Dialog. Look that have popup stele and rename IDD_MAIN.  