private void DataBillFrmToolStripMenuItem_Click(object sender, EventArgs e) { if (FrmDataBill.IsDisposed) { FrmDataBill = new DataBillFrm(); FrmDataBill.MdiParent = this; FrmDataBill.Show(); } else { if (FrmDataBill.Visible) { FrmDataBill.WindowState = FormWindowState.Normal; FrmDataBill.Focus(); } else { FrmDataBill.MdiParent = this; FrmDataBill.Show(); } } FrmDataBill.Icon = MCls.MakeIcon(global::StoreAccount.Properties.Resources.dataBillFrm, 16, false); }