private void btnWriteBytes_Click(object sender, EventArgs e)
{
txtBytesOut.Clear();
string[] s = tub.ReadBytes(txtBytesIn.Lines);
if (s == null)
{
MessageBox.Show("Input format error: make sure there are no spaces and use only 2 digit hexidecimals.");
}
else
{
txtBytesOut.Lines = s;
}
}