private void btnGetTime_Click(object sender, EventArgs e)
{
txtNowTime.Text = txtReaderTime.Text = "";
((Button)sender).Enabled = false;
Application.DoEvents();
PassiveCommand.GetTime(SystemPub.ADRcp);
//if (!SystemPub.ADRcp.SendBytePkt(PassiveRcp.GetTime(SystemPub.ADRcp.Address))) { }
((Button)sender).Enabled = true;
}