Logic Using Files And Parallel Lists

Direction with some logic using files and parallel list.. I have to create a summary of a current clients portfolio using the client id I have in a textbox. I've everything to work except the summary of the client. I have several sub functions that I can use that I've made up in my code. They are frmMain_Load that have a file and a string holding the client txtfile to a file

Dim clientFile As System.IO.StreamReader 'file of client data
Dim clientFileName As String = "faclient.txt" '

And I have two functions Private Sub GetStockData(ByVal sCode As String, ByRef sName As String,ByRef sPrice As Double) and Private Sub GetNextTran(ByRef tid As String, ByRef tcode As String, ByRef tdate As Date, ByRef ttype As String, ByRef tshares As Integer, ByRef tprice As Double). I have to add to a label,a summary tha shows the stock code, stock name, number of shares currently held, current share price and value(shares times current price). The number of shares currently help will be the result of adding the shares bought and subracting the shares sole for that stock. If the number of shares help turns out to be zero(client sold all the shares they bought), do not display the line. The program should not assume there is an upper limit to the number of different stocks a client can hold. I know is alot..But here is what I have so far..

Private Sub btnSummary_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSummary.Click
'get a summary of client portfolio and value
Dim summaryCodeList As New List(Of String) 'holds scode
Dim sharesList As New List(Of Integer) 'holds tshares

[CODE]...