Is there a way to include the Lubuntu applications menu in an Openbox menu (
~/.config/openbox/menu.xml) so I can use it within a pure Openbox session?
lxpanel use .desktop files for menu and openbox use xml(menu.xml) so you need a converter, for example: http://obmenugen.sourceforge.net/
Generates a full menu for openbox using the information present in *.desktop files (with static content or dinamically generated).
What you need is a Pipe menu.
A pipe menu is a dynamic menu item that is created by a program every time the menu is opened.
There are multiple programs that can create a pipe menu of the installed applications. Here is a list of featured pipe menus from Openbox.org.
Since you use Lubuntu you would most likely be interested in openbox-menu. It uses the menu cache of LXDE to create the application menu. There is a Ubuntu package here. I don't know if it is in the official repository, you should check that.
To use a pipe menu you need to edit your Openbox menu file at
In your menu file you need to add a new menu item under your
root-menu that looks like this
You will need to replace
<path-to-exec> which the path to
You can get the path with
Then you will have a new menu item labeled Applications in your Openbox menu.
It you never edited your
menu.xml take a look at the menu documentation from Openbox.