var prj = DlxApp.GetJob().GetProject("Example Sch");
if (!prj.IsValid())
  prj = DlxApp.GetJob().NewProject("Example Sch");
var doc = prj.GetDocument("Examples Sch", DlxApp.DOCTYPE_SCHEMATIC);
if (!doc.IsValid())
{
  doc = prj.NewDocument("Examples Sch", DlxApp.DOCTYPE_SCHEMATIC);
  doc.SetPageFormat("A4", false);
}
if (doc.IsValid() && doc.Activate())
{
  var page = doc.GetActivePage();
  if (page.IsValid())
  {
    var layer = page.GetLayerFromType(DlxApp.LAYERTYPE_DRAWING);
    if (layer.IsValid())
    {
      var pen = new DlxPenStyle(0.5, new DlxColor("orangered"));
      doc.SetStyle(pen);  
      var brush = new DlxBrushStyle("beige");  
      doc.SetStyle(brush);

      var obj = layer.DrawPath(new DlxPoint(30, 30), new DlxPoint(80, 90), 3, DlxApp.PATHCAP_ROUND, DlxApp.PATHCAP_ARROW, false);

      // Extends the path.
      var angle = obj.GetStartPoint().ArcAngle(obj.GetEndPoint());
      obj.SetStartPoint(obj.GetStartPoint().CirclePoint(-10, angle));
      obj.SetEndPoint(obj.GetEndPoint().CirclePoint(10, angle));

      // Set the line thickness to 2mm.
      var pen = new DlxPenStyle();
      obj.GetStyle(pen);
      pen.SetWidth(1);
      obj.SetStyle(pen);
    }
  }
}