var filename = "demofile.txt";
// write file
var file = new DlxFile(filename, DlxApp.FILEOPEN_WRITETEXT);
if (file.IsValid())
{
  for (var i = 0; i <= 90; i++)
	file.Write(i.toString() + "° : " + Math.sin(i / 180 * Math.PI) + "\n");
  file.Close();
}
// read file
file = new DlxFile(filename, DlxApp.FILEOPEN_READTEXT);
if (file.IsValid())
{
  while (!file.IsEOF())
	DlxApp.Printf("%s", file.ReadLine());
  file.Close();
}
else DlxApp.Printf("File not found.");