On Windows 7, is there any way to make the scrollwheel's focus follow the mouse?

Problem

On Mac OS X I can mouse over something (without clicking on it or giving it complete focus) and use the scroll wheel to scroll it. On Windows (7 at least) which I'm forced to use in my new job, it does not work this way. Is there any way to change this behavior? I notice that Firefox does this within the app: if any Firefox windows have focus then you can scroll any other Firefox window that doesn't. (So at least the Firefox people think this is a useful feature! And so anyone not familiar with how it works on OS X can see what I'm talking about.) I remember TweakUI (which does not seem to be available for Windows 7) having a setting for "Focus follows mouse", but I don't recall if it allowed setting that only for the scroll wheel. I don't want the full X-Windows style focus-follows-mouse setting, just the ability to scroll whatever I mouse over. UPDATE: According to @Mikey's comment, this is now built into Windows 10. UPDATE: it has been suggested that my question is a duplicate of t…