vb.net treeview with databbase and textbox

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VB

SQL

Dear All,

I have few question regarding using Treeview in my project. The screen of my project is been attched.

I can populate the data from database in treeview using following code:
[code]

Imports System.Data.SqlClient
Public Class Tree

    Private Sub Tree_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim dsTest As DataSet
        Dim cnTest As New SqlClient.SqlConnection("DATA SOURCE=myPC\DBserver;USER ID=sa;PASSWORD=udo5673;INITIAL CATALOG=ZINDAA;")
        Dim daCountry As New SqlClient.SqlDataAdapter("SELECT CsCountryCode,CsCountryName from hrCountrySetup", cnTest)
        dsTest = New DataSet()
        cnTest.Open()
        daCountry.Fill(dsTest, "dtCountry")
        cnTest.Close()

        TreeView1.Nodes.Clear()
        Dim parentrow As DataRow
        Dim parenttable As DataTable
        parenttable = dsTest.Tables("dtCountry")
        For Each parentrow In parenttable.Rows
            Dim parentnode As New TreeNode
            parentnode = New TreeNode(parentrow.Item(0) & " - " & parentrow.Item(1))
            TreeView1.Nodes.Add(parentnode)
        Next parentrow
    End Sub
End Class

[/code]

now with my treeview, i want to fill my texbox1,textbox2 with the value of treeview node when user selects the treeview node.

I could get idea on how to. CAN ANYONE HELP ME?