update / add row in datatable

[Tim Randall]

Hi,
I am trying to update and/or add rows to a datable, and although the records are changed in the datatable they are not updated in the database. I can update using sql commands, but I would rather update a row directly and then update the database. I had a look at Dan Carr's post which was a similar problem but I can't seem to get it to help me.
Thanks in advance.
My code is as follows;

Dim da As MySqlDataAdapter
Dim data As DataTable

Dim conn As New MySqlConnection

conn = GetConnection(ConnectionDetails)

da = New MySqlDataAdapter("Select * from submissions", conn)

Dim cb As MySqlCommandBuilder = New MySqlCommandBuilder(da)

data = New DataTable

da.Fill(data)

data.Rows(0).Item("Title") = "Testing update"

data.AcceptChanges()

da.Update(data)

conn.Dispose()