private void solingScrew_FormClosing(object sender, FormClosingEventArgs e)
{
DialogResult res = MessageBox.Show("您确定要退出程序吗?", "退出确认", MessageBoxButtons.OKCancel, MessageBoxIcon.Exclamation);
if (res == DialogResult.OK)
{
comm.ScomClose();
e.Cancel = false;
}
else
{
e.Cancel = true;
}
}