Windows - Alt Click on a window to close window under the mouse cursor

Is it possible to close a window, simply by clicking anywhere inside it? Hold down alt key, and click the windows you want closed. Much like shooting targets in a game.

Why not Alt+F4? This would be more useful because Alt+F4 requires the window to be active. If not, you have to click on the window to bring it to the front first. An extra step.