private void button3_Click(object sender, EventArgs e)
 {
     PurchaseOrderDisplay app2 = new PurchaseOrderDisplay();
     app2.Show();
 }
 protected override void button_DisplaySelectedObject_Click(object sender, EventArgs e)
 {
     // this.Close();
     PurchaseOrderDisplay dispObj = new PurchaseOrderDisplay(base.ident); dispObj.Show();
 }