Get current platform

How can i get the current platform? I wont to execute some code only on windows and not on android (building an .apk and a .exe).
Something like:

if (isWindows)
    someCode();
else 
    return;

It’s pretty easy!

#if UNITY_EDITOR
        someCode ();
#elif UNITY_ANDROID
        someCode ();
#elif UNITY_IOS 
        someCode ();
#elif UNITY_STANDALONE_OSX
        someCode ();
#elif UNITY_STANDALONE_WIN
        someCode ();
#endif