Vcoderz Community - asp.net help

hello i am a student in asp.net course and i hav e a homework or competition and i need your help.... i am working on access database that contains : productcode,productname,price,quatity,categoryid(r elated to another table categories) my work is to delete ,update the info of the product when the productcode is selected after i click th button that is a sample:

ID: textbox
Name: textbox
Price:textbox
qtty:textbox
categories:dropdownlist related to the database categories

when i write a productcode and click on the button delete\update i have to delete\update the info of this product

that is the code that i write it and cannot continue it :

ProtectedSub btnDelete_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDelete.Click

Dim con As New OleDbConnection()

con.ConnectionString ="Provider = Microsoft.Jet.Oledb.4.0;Data Source=C:\Users\NONINO\Documents\Visual Studio 2008\WebSites\homwork 5\App_Data\Company.mdb"

con.Open()

Dim cmd As New OleDbCommand()

cmd.Connection = concmd.CommandText =String.Format("DELETE FROM PRODUCTS product where ProductCode = @productcode values ('{0}') ", tbxProductcode)

hope i will get your help as fast as you can and thank you a lot......