Sorry, I don't know whether to ask this question under Hardware>Mouse or under OS>Win XP.
Way back when I was fluent in DOS and fearless enough to mess with my Registry, mice first came out with three buttons and you could configure the middle button as a double-click by editing a value in the Windows Registry.
Since then, Logitech (bless 'em) have come out with Mouseware, which takes most of the pain out of configuring mice. However, I am still using a (Logitech three-button) Serial port mouse on a recent, decent Win XP computer. And Logitech say that the current version of Mouseware for XP does not support Serial mice.
Now, I could just go out and buy a PS/2 or a USB mouse, but what I would rather do is to tweak whatever I have to tweak to configure the middle button of my perfectly adequate Serial mouse as a double-click (you won't believe how much more quickly you can clean up when playing Solitaire if you have a double-click button :-).
Does anybody remember what I have to do? Is this still possible?