How to get the OUT value of a MySQL 5 stored procedure with VB.NET

Hi,

Im using MySQL 5 with VB.NET to create a stored procedure that selects the total of a customers basket. At present I have a stored procedure that takes the userID as IN parameter like so:

create procedure sp_select_basket_total(IN inUID INT)
select sum(price*qty) from basket where uid = inUID  group by uid

How can I get this to give me the value of the select statement as an OUT parameter?

My VB is below:

    Public Shared Function writeBasketTotal(ByVal UID As Integer) As DataSet
        Dim connStr As String = ConfigurationManager.AppSettings("connStr")
        Dim conn As New MySqlConnection(connStr)
        Dim cmd As New MySqlCommand
        Dim dsReturn As New DataSet

        Try
            conn.Open()
            cmd.Connection = conn
            cmd.CommandText = "sp_select_basket_total"
            cmd.CommandType = CommandType.StoredProcedure
            cmd.Parameters.Add("?inUID", UID).Direction = ParameterDirection.Input
            Using daloader As New MySqlDataAdapter(cmd)
                daloader.Fill(dsReturn)
            End Using
            Return dsReturn
            conn.Close()
        Catch ex As Exception
            Return dsReturn
        End Try
    End Function

Thanks in advance