SUBROUTINE RMCURSOR

 RMCURSOR returns ths position of the Ramtek Package graphics input device.

CALL RMCURSOR (x,y,k,b,rx,ry)

x,y (R): (returned) selected cursor position (in plot units)
k   (I): (returned) ASCII key code
         = 0 mouse pressed
b   (I): (returned) mouse button code
         = 0 key pressed
rx  (R): resolution of screen in x direction (returned)
ry  (R): resolution of screen in y direction (returned)