USB controllable display

I'm looking to be able to display status information using a small LED or a small LCD screen connected through USB.

All I need to dis开发者_高级运维play is very simple status (standby, error, running).

Is there anything already made, decent looking and programmable through C++?

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Are you looking for something like this ? Since it's USB HID class, it should be fairly trivial to control from C++ on both Windows and Linux. (And I assume Mac OSX wouldn't be that hard either)

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The Logitech G15 has one.