Method for a device to perform a function in response to a command from a printer

摘要

A method is disclosed of controlling a function of a device. The device is operative to perform the function in response to a command from a printer. The method starts by printing a control interface containing information relating to the function and coded data. The coded data is indicative of an identity of the control interface and of at least one reference point of the control interface. Next, indicating data is received by the printer from a sensing device. The indicating data contains the identity of the control interface and at least one position of the sensing device relative to the control interface. The sensing device forms the indicating data when placed in an operative position relative to the control interface using the coded data. Finally, the printer issues the command relating to the function to the device.