lxde where is focus follows mouse

[Harry Putnam <reader@newsguy.com>]

Running Wheezy as guest in win7 64 bit host with virtualbox.

How can I set "Focus follows mouse" in lxde desktop?

I've installed lxde-core, lxde-common, lxde  and task-lxde-desktop

Usually I found that setting under the settings dialog, then "windows"

amongst the settings for windows.

I do not see anything like that under the menus available on bottom
left with left click.

I read somewhere it could be done under ~/.config/openbox/lxde-rc.xml.
I have no such directories or files under ~/.config