private void btnConfirm_Click(object sender, EventArgs e)
{
r.checkOut(userId);
u.updatePoint(userId, (point - totalPoint));
int x = u.userPoint(sellerId);
u.updatePoint(sellerId, (x + pointS));
this.Dispose();
CheckOut c = new CheckOut(userId, point);
c.Show();
this.Hide();
}
