Sort DataAdapter Alphabetically - VB.Net

This should be a fairly simple one. I am creating a dataset which will contain a description field which I would like to sort by. The reason I want to sort the dataadapter and not in my SQL is that I am already ordering by the results that have a particular value. My SQL looks like this:

SELECT pif_desc, pif_fund, psf_end, (CASE WHEN SUM(pmi_units) IS Null THEN 0 ELSE SUM(pmi_units) END) As fundunits FROM tbl_mem INNER JOIN tbl_sfunds ON pm_scheme = psf_scheme INNER JOIN tbl_invfun ON tbl_fund = tbl_fund LEFT JOIN pe_minv ON pmi_fund = pif_fund AND pm_member = pmi_member WHERE pm_member = @pm_member GROUP BY pif_desc, pif_fund, psf_end ORDER BY fundunits DESC

My VB looks like this:

Dim cmd As New SqlCommand("getMembersFundsDCGENST", conn)
cmd.CommandType = CommandType.StoredProcedure
Dim p_pm_member As New SqlParameter("@pm_member", SqlDbType.Int)
p_pm_member.Value = pm_member
cmd.Parameters.Add(p_pm_member)
Dim p_period_closing_date As New SqlParameter("@closingdate", SqlDbType.DateTime)
p_period_closing_date.Value = period_closing_date
cmd.Parameters.Add(p_closing_date)
Dim da As New SqlDataAdapter(cmd)
da.Fill(ds)

I want to sort the datarows is ds.tables(0) by pif_desc but still have the rows with fundunits > 0 listed first.