X1 / X2 / Y1 / Y2 The line is drawn from (X1,Y1) to (X2,Y2).
If neither X1 nor X2 are set,
X1 is set to the lefthand margin and X2 is set to X1 + W.
If only one is set,
the other is set to the first +/- W.
If either of the Y values is not set,
it is set to the current Y value.
W This is the width of the line to be drawn.
Used only in calculating X1/X2/Y1/Y2 and only if needed.
above) Defaults to the distance between the left and right margins.
PAGEDEF for more information on these parameters.)
WIDTH This is the thickness of the line to be drawn.
Defaults to 1 pixel.
COLOR This is the color to draw the line in.
Defaults to black.