Screen Locking Shortcut in LXDE

I liked having a keyboard shortcut, ctrl-alt-l, to lock the screen under Gnome. But in LXDE, it was a bit trickier to setup. There isn't a fancy GUI for setting these options (that I know of), one has to edit Openbox's configuration file: ~/.config/openbox/lxde-rc.xml

Find the "<keyboard>" section and add the following:

    <keybind key="C-A-l">
      <action name="Execute">
        <command>xscreensaver-command -lock</command>
      </action>
    </keybind>