quick database question

I'm a beginner at VB.Net and have a question about a problem I've been assigned. It's accessing an Access database which looks like this:

city country pop1995 pop2015
* * * *
* * * *
(etc.)

Question: Write a program that allows the user to specify a city and then displays the percentage of its country's 1995 population that lives in that city.

Here's what I have so far:

Code:

---

Private Sub Form1_Load(…) Handles MyBase.Load
        dim I As Integer
        dim connStr As  String =  Provider=Microsoft.Jet.OLEDB.4.0;” & _
                “Data Source = MEGACITIES.MDB”
        dim sqlStr As String = “SELECT * FROM Cities”
        dim DataAdpater As New OleDb.OleDbDataAdapter(sqlStr, connStr)
        Dim dt As New dataTable()
        dataAdapter.Fill(dt)
        dataAdapter.Dispose()
        dim whichCity As String
        whichCity = InputBox(“Please enter the city?”, “message”)

---

What next??