GfxArc

Lowlevel graphics 
SYNTAX  GfxArc( x1, y1, x2, y2, x3, y3, x4, y4 ) 
RETURNS  NOTHING 
FUNCTION  Draws an elliptical arc. The arc drawn by using the function is a segment of the ellipse defined by the specified bounding rectangle. The actual starting point of the arc is the point at which a ray drawn from the center of the bounding rectangle through the specified starting point intersects the ellipse. The actual ending point of the arc is the point at which a ray drawn from the center of the bounding rectangle through the specified ending point intersects the ellipse. The arc is drawn in a counterclockwise direction. Parameters
NOTE: This is LOWLEVEL graphic function. To learn more about lowlevel graphic functions please read TUTORIAL: Using lowlevel graphics. 
EXAMPLE 

SEE ALSO  GfxChord() function , GfxPie() function , GfxSelectPen() function 
The GfxArc function is used in the following formulas in AFL online library:
See updated/extended version online.