private void BalanceGeneralToolStripMenuItem_Click(object sender, EventArgs e) { if (frm_balance_General == null) { frm_balance_General = new balance_general(); frm_balance_General.MdiParent = this; frm_balance_General.FormClosed += new FormClosedEventHandler(frm_balance_General_FormClosed); frm_balance_General.Show(); } else { frm_balance_General.Activate(); } }
//==========Funciones para evitar que se habrá 2 veces la misma ventana========== private void frm_balance_General_FormClosed(Object sender, FormClosedEventArgs e) { frm_balance_General = null; }