private void verTurnosToolStripMenuItem_Click(object sender, EventArgs e) { if (listTurn == null) { listTurn = new frmListarTurnos(); listTurn.MdiParent = this; listTurn.FormClosed += new FormClosedEventHandler(listTurn_FormClosed); listTurn.Show(); } }
void listTurn_FormClosed(object sender, EventArgs e) { listTurn = null; }