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 font = new DlxFontStyle("arial", 10, DlxApp.FONTSTYLE_BOLD, DlxApp.FONTUNIT_POINT);
      var backg = new DlxBrushStyle("orange");

      var style = new DlxTextStyle(font, "blue");
      doc.SetStyle(style);
      layer.DrawText(new DlxPoint(50, 50), "Hello World.", 0, DlxApp.TEXTFLAGS_ALIGNDEFAUL);

      style.SetBackground(backg);
      doc.SetStyle(style);
      layer.DrawText(new DlxPoint(50, 60), "Hello World.", 0, DlxApp.TEXTFLAGS_ALIGNDEFAUL);
    }
  }
}