I tried that on my WinXP box with two USB mice connected and it worked perfectly. The test pops up a window displaying the properties for each mouse and the keyboard. I can click the mouse buttons and see the corresponding properties change for that mouse.

Excellent, thanks.

I've been wondering about putting together a 'Sale of the Century' type game for kids. I'd like to be able to use off-the-shelf hardware, so had thought of just using a few USB mice as buzzers. Each contestant would be given a mouse to hold. The software would listen for the first button click and display a message or play a sound to indicate which mouse that corresponded to.

Is it possible to detect mouse events from different mice plugged into the same system and distinguish them from each other? If not, I imagine I could probably do it with gamepads instead.

Any advice would be appreciated.