Active edges for *box like wm's

This is taken from the gentoo wiki on Fluxbox:
Active edges

Also known as Hot corners, active corners, or similar. In fluxbox, you don't have the possibility of binding actions to special mouse positions on the screen. For example you might want to switch Desktops, if your mouse hits the side of your screen (like in e17). However, there is a small python script, that you can use and modify depending on your needs. This script does not principally depend on fluxbox, you can use it in other Window managers as well. You can add this script to your .fluxbox/startup, so that the script is run in background and autostarts with fluxbox.

For the script code in python see:source: http://en.gentoo-wiki.com/wiki/Fluxbox