Quickly determine if code is Visual C++ or not

Is ther开发者_C百科e a quick way to determine whether a Visual Studio C++ project is written in plain C++ or Visual C++?

If any files include the lines #pragma once or #include "stdafx.h", it's very likely Visual C++.

(Are there any other compilers that implement #pragma once?)

No -- Visual C++ will compile most plain C++ without any problems. If you want to check for use of Windows-specific "stuff", checking for inclusion (directly or indirectly) of <windows.h> would probably be a reasonable start.

If is Visual C++ it usually has a project.sln or project.vcproj file in the project directory.