Someone else can probably give you a more in depth answer to this but in a word no you can't. You could on the other hand create your own device using a microcontroller with either onboard USB support or using a second IC for the USB communications. Then you could make it do whatever you wanted. However it's pretty involved as the USB protocol requires that the PC and USB device undertake certain steps in the correct order just to be connected up properly (called enumeration). Have a look at http://www.beyondlogic.org/usbnutshe...C16F876Example to give you some idea of what you'd be getting yourself into....