private void displayIncidentsByProductsAndTechnicianToolStripMenuItem_Click(object sender, EventArgs e)
 {
     if (ir == null)
     {
         ir = new IncidentReport();
         ir.MdiParent = this;
         ir.FormClosed += new FormClosedEventHandler(ir_FormClosed);
         ir.Show();
     }
     else ir.Activate();
 }
 private void ir_FormClosed(object sender, FormClosedEventArgs e)
 {
     ir = null;
 }