GfxChord

Lowlevel graphics 
SYNTAX  GfxChord( x1, y1, x2, y2, x3, y3, x4, y4 ) 
RETURNS  NOTHING 
FUNCTION  Draws a chord (a closed figure bounded by the intersection of an ellipse and a line segment). The (x1, y1) and (x2, y2) parameters specify the upperleft and lowerright corners, respectively, of a rectangle bounding the ellipse that is part of the chord. The (x3, y3) and (x4, y4) parameters specify the endpoints of a line that intersects the ellipse. The chord is drawn by using the selected pen and filled by using the selected brush.
Parameters
NOTE: This is LOWLEVEL graphic function. To learn more about lowlevel graphic functions please read TUTORIAL: Using lowlevel graphics. 
EXAMPLE  GfxSelectPen( colorRed ); 
SEE ALSO  GfxSelectPen() function , GfxSelectSolidBrush() function , GfxPie() function 
The GfxChord function is used in the following formulas in AFL online library:
See updated/extended version online.