void fm_ReturnEvent(List<string> GPSCodes)
{
if (!GPSCodes.IsEmpty())
{
txtVehCode.Text = GPSCodes.JoinToString(",");
}
fm = null;
}
private void button4_Click(object sender, EventArgs e)
{
fm = new Fm_VehHistory();
fm.ReturnEvent += new Fm_VehHistory.ReturnDelegate(fm_ReturnEvent);
fm.Show();
}
