PEN - a device I/O function that reads the lightpen coordinates Syntax PEN(n) - n, a numeric expression that has an integer value between 0 and 9, indicates what type of information you want returned by the function: ------------------------------------------------------------------------------ 0 whether pen was down since last | 4 last-known valid x-coordinate function call (-1 = yes, 0 = no) | 5 last-known valid y-coordinate 1 x-coordinate of last pen press | 6 character row of last pen press 2 y-coordinate of last pen press | 7 character column of last pen press 3 current pen switch status | 8 character row of last pen position (-1 = down, 0 = up) | 9 character column of last position ------------------------------------------------------------------------------ See Also