How to turn on barcode scan reader?

Hi! I have this code on my zebra mk500 device and works fine when I turn on the scanner with other app, but the question are , how I turn on the scanner when my app start?

 

 

private Symbol.Barcode.Reader MyReader = null;
private Symbol.Barcode.ReaderData MyReaderData = null;

private void Form1_Load(object sender, EventArgs e)
{
  
MyReader = new Symbol.Barcode.Reader();
  
MyReaderData =
  
new Symbol.Barcode.ReaderData(Symbol.Barcode.ReaderDataTypes.Text,
  
Symbol.Barcode.ReaderDataLengths.DefaultText);
  
MyReader.ReadNotify += new EventHandler(MyReader_ReadNotify);
  
MyReader.Actions.Enable();
  
MyReader.Actions.Read(MyReaderData);
  
return;
}

private void Form1_Closing(object sender, CancelEventArgs e)
{
  
MyReader.Actions.Flush();
  
MyReader.Actions.Disable();
  
MyReader.Dispose();
  
MyReaderData.Dispose();
  
return;
}

private void MyReader_ReadNotify(object sender, EventArgs e)
{
  
System.Windows.Forms.MessageBox.Show(MyReaderData.Text, "HelloScan");
  
MyReader.Actions.Read(MyReaderData);
  
return;
}