How to remove focus on button when reading data from scanner barcode

public partial class Form1 : Form
    {
        DateTime _lastKeystroke = new DateTime(0);
        List<char> _barcode = new List<char>(10);
        public Form1()
        {
            InitializeComponent();
         
        }

        
        private void Form1_KeyPress(object sender, KeyPressEventArgs e)
        {
            TimeSpan elapsed = (DateTime.Now - _lastKeystroke);
            if (elapsed.TotalMilliseconds > 100)
                _barcode.Clear();

            // record keystroke & timestamp
            _barcode.Add(e.KeyChar);
            _lastKeystroke = DateTime.Now;

            // process barcode
            if (e.KeyChar == 13 && _barcode.Count > 0)
            {
                string msg = new String(_barcode.ToArray());
                label1.Text = msg;
                //queryData(msg);
                _barcode.Clear();
            }
        }
    }
}

how to remove focus on button when reading data from scanner barcode