What USB Devices are Supported/Tested Under Windows CE?
Microsoft does not plan to test/support USB devices such as Printers, Scanners, Cameras, Input devices, SCSI and other storage devices (like Clik drives), and so forth, in Windows CE version 2.1. The Windows CE USB subsystem provides full OHCI host support (on the PC-Based Hardware Development platform), such that OEMs can write their own USB client drivers to support planned devices. OEMs can refer to the MOUSE client driver as an example.