[openbox] How to assign "Middle-Mouse-Button-Click" to a Key-Binding?

[John]

Hi @ all,

i want to have a keyboard-shortcut/keybinding for my
middle-mouse-button, so that i can easily copy&paste from and to
terminals and vim without using the mouse.

As far as i understood i can assign Actions to Keys (like A-F10 for
ToggleMaximizeWindow) and i can assign Actions to Mousebuttons - but
can i assign Mousebuttons to Keys?

I read this:
http://openbox.org/wiki/Help:Bindings
http://openbox.org/wiki/Openbox:Community_portal

Peace,

;j