private void bloodBankToolStripMenuItem_Click(object sender, EventArgs e) { if (mnForm == null) { mnForm = new ManageBloodForm(); mnForm.FormClosed += new FormClosedEventHandler(ManageBloodForm_FormClosed); mnForm.MdiParent = this; mnForm.Show(); } else { mnForm.Activate(); } }
private void ManageBloodForm_FormClosed(object sender, FormClosedEventArgs e) { mnForm = null; }