Treeview Query To A Database?

I have the code below, what i have is three volumes called vol2 vol 3 and QRH (these are parent nodes in a treeview), these nodes are named in my database in a volume column 2,3 and 4 respectively. what i want to do is run a query that populates a treeview with another column depending on which parent node is clicked.

A drawing
Volume Parent node name (in treeview) child node
2 vol2 flightpath
3 vol3 takeoff
4 QRH landing
2 vol2 data

and there are more than one child node that has volume 2,3 or 4 what i want is if vol2 is clicked this is oppened

vol2
---Flightpath
---Data
etc etc

below is the code i am working on:

If tvwFCOM.SelectedNode.Text = "vol2" Then
Dim Volume As String = "2" And
Query = New OleDb.OleDbCommand("Select Title From " & cmbFamily.Text & " _Chapters Where Volume = '" & Volume & "'", AccessConn)
End If

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