C#

Encoding source = Encoding.GetEncoding(1252);
Encoding target = Encoding.UTF8;

byte[] input = new byte[1] {0xE9};
byte[] output = Encoding.Convert(source, target, input);

string result = Encoding.UTF8.GetString(output);
Console.WriteLine(result);

delegate void DataReceivedHandler(byte[] data);

void Loop()
{
  while(true)
  {
    // blah blah read data
    if (DataReveived != null)
    {
      DataReceived(data);
    }
  }
}

void OnDataReceived(byte[] data)
{
  // blah blah handle data
}

void StartLoop()
{
  DataReceived = new DataReceivedHandler(OnDataReceived);
  Thread.Start(new ThreadStart(Loop));
}