Abstract: A switch controller 21 in the switching device receives input from a mouse 12 which is used to control movement of a pointer on a display connected to a host 20 which currently has focus. Each host is provided with a custom service 28 which monitors the position of the pointer via the system mouse controller 27 when the respective host has focus, and signals the switching device to change focus to another connected host when the pointer is moved to the edge of the screen. The controller 21 can also command the custom service 28 of the host which receives focus to reposition the pointer on the display. The communications between the switch controller 21 and the host 20 may be implemented using a standard USB HID driver.