Is this possible? I want to close programs in the taskbar with middle-click, like tabs in firefox. The best approach I have so far is waiting for the mini-view that pops up when you point with the mouse in the taskbar and then middle-clicking there, but I would like to close them directly.
Now I don't miss the pre-Windows 7 feature where I could CTRL-click multiple windows from the taskbar and close them all at once. Middle clicking is actually faster and I very rarely want to start a new instance by middle-clicking or use those jump lists (I got the standard menu back^^).
update: The 7 Taskbar Tweaker site doesn't play nice with some foreign IP addresses (returns 403:Forbidden). Download 7 Taskbar Tweaker v3.3.2 from a mirror.
You could also do that with a AutoHotkey script.
The following one could be the right thing for you: http://www.autohotkey.com/forum/topic8434.html
What type of mouse do you have and are you running the bare minimum mouse drivers? I currently have a one of the new "blue" mice from Microsoft, and installed the drivers that came along with it. The extended drivers will let you change the action of all the buttons on the mouse globally or program specific. I'm pretty sure that Logitech drivers allow the same thing too. One of the available options to change for the middle button is Exit Program.