A system for enabling user interaction with computer software. The system includes a computer system which transfers print data to a printer, the printer being responsive to the print data to print a form by printing information indicative of a text field and coded data at least partially indicative of the text field. The coded data is coincident with the information so that when a sensing device is moved in an operative position relative to the text field, the sensing device can sense the coincident coded data and generate the indicating data indicative of movement of the sensing device relative to the text field. The computer system uses the indicating data to determine movement of the sensing device relative to the at least one text field and then perform an action associated with the text field at least partly based on the movement of the sensing device.