private void btnDaoKu_CheckedChanged(object sender, EventArgs e)
{
if (btnDaoKu.Checked)
{
formDaoKu = new FormDaoKu(this, plcHelper);
formDaoKu.FormClosed += new FormClosedEventHandler(formDaoKu_FormClosed);
formDaoKu.ShowDialog();
btnDaoKu.Checked = false;
}
}
void formDaoKu_FormClosed(object sender, FormClosedEventArgs e)
{
formDaoKu = null;
}
