LXRECT(ix1.i2.r, iy1.i2.r, ix2.i2.r, iy2.i2.r [,kolor.i1.r])

	This routine will draw a rectangle with horizontal and vertical sides.
	on the LX color graphics display window.  (IX1,IY1) and (IX2,IY2) are
	the coordinates of 2 diagonal corners.  Rectangle color is determined
	by the optional color code argument KOLOR.  See the descriptions of
	the LXPNT and LXMODE routines for information on color codes.  The
	rectangle will be filled or unfilled depending on the most recent
	call to LXRCMD.