Determine if any records are returned

If want to use the following to return a group of records from an access database.  How would i determine if any records were returned or not?

 Dim cn As New OleDbConnection(Global_Values.strConn)
        Dim cmd As New OleDbCommand(sSQL, cn)
        Dim dr As OleDbDataReader

        If cn.State = Data.ConnectionState.Closed Then
        End If

        dr = cmd.ExecuteReader
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While dr.Read

End while

if dr.HasRows then

end if

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or even

if dr.ReadI() then

end if
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Visual Basic.NET

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