private void button1_Click(object sender, EventArgs e)
{
    int i = 4;
    hec = hd.Links; //网页超链接列表
    HtmlElement he = hec;
    Point temp = GetOffset(he);
    MessageBox.Show(string.Format("Tite = {2} x = {0},y = {1}",temp.X,temp.Y,he.OuterText));
}
      
public Point GetOffset(HtmlElement el)
{
    //get element pos
    Point pos = new Point(el.OffsetRectangle.Left, el.OffsetRectangle.Top);
      
    //get the parents pos
    HtmlElement tempEl = el.OffsetParent;
    while (tempEl != null)
    {
        pos.X += tempEl.OffsetRectangle.Left;
        pos.Y += tempEl.OffsetRectangle.Top;
        tempEl = tempEl.OffsetParent;
    }
      
    return pos;
}
      
var point = GetOffset(element);
var x = point.X;
var y = point.Y;