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; }