private void OpenListOfBills() { Bills bills = new Bills(); bills.MdiParent = this.MdiParent; this.MdiParent.ActiveMdiChild.Close(); bills.Show(); }
private void billToolStripMenuItem_Click(object sender, System.EventArgs e) { if (_instanceBillsForm == null) { CloseAllForms(); _instanceBillsForm = new Bills(); _instanceBillsForm.MdiParent = this; _instanceBillsForm.FormClosed += instanceBillsFormHasBeenClosed; } else { ShowMessage(); } _instanceBillsForm.Show(); }