private void btnUpdateCart_Click(object sender, EventArgs e)
{
OrderItemScreen ois = new OrderItemScreen(newOrder, owningCompany, selectedItem, editing, true);
ois.MdiParent = this.MdiParent;
ois.Show();
this.Close();
}
private void btnAddItem_Click(object sender, EventArgs e)
{
SetOrder();
OrderItemScreen ois = new OrderItemScreen(newOrder, owningCompany, editing);
ois.MdiParent = this.MdiParent;
ois.Show();
this.Close();
}