1. A method of operating a touch screen to activate one of a plurality of virtual GUI items, comprising: determining a touch location based on location data pertaining to touch input on the touch screen, wherein the touch input is intended to activate one of the plurality of virtual GUI items; for each of the plurality of virtual GUI items, each virtual GUI items having a set of at least one GUI item location corresponding to it, determining a parameter for that virtual GUI item that relates the touch location and the set of at least one item location corresponding to that virtual GUI item; processing the determined parameters to determine one of the virtual GUI items; and generating a signal indicating activation of the determined one of the virtual GUI items.