Flash MX 2004.
shape.contours
Read-only property; an array of Contour objects for the shape (see Contour object).
The following example stores the first contour in the contours array in the c variable and then stores the HalfEdge object of that contour in the he variable:
var c = fl.getDocumentDOM().selection[0].contours[0];
var he = c.getHalfEdge();