private void prereglbl_Click(object sender, EventArgs e) { if (prereg == null) { prereg = new uprereg(); prereg.MdiParent = this; prereg.FormClosed += Prereg_FormClosed; prereg.Show(); } else { prereg.Activate(); } }
private void Prereg_FormClosed(object sender, FormClosedEventArgs e) { prereg = null; // throw new NotImplementedException(); }