lxcarc

	LXCARC(ixc.i2.r, iyc.i2.r, radius.i2.r, start.i2.r, arclen.i2.r
	       [,color.i2.r])

	This routine will draw an arc of a circle centered at (IXC,IYC)
	with radius RADIUS, on the LX color graphics display window.
	The arc will be filled if the most recent call to LXRCMD has
	set fill mode to TRUE.

	IXC,IYC	coordinates of the centerpoint

	RADIUS	radius of arc in pixels

	START	starting position of arc counted in
		degrees counterclockwise from 3 o'clock

	ARCLEN	length of arc in degrees, counted
		counterclockwise from start

	COLOR	arc color

	See the descriptions of the LXPNT and LXMODE routines for information
	on color codes.  Arc pattern is	determined by the most recent call to
	LXPATT.