How do I list Multiple Drives in Treeview

Question

Hello all. I'm creating a Backup Program using a Treeview. I want to be able to show all available drives and directories but am only able to show the C: drive. This is how I am specifying my nodes: oNode.ImageIndex = 0 ' Closed folder oNode.SelectedImageIndex = 0 oNode.Text = "C:" tvBackup.Nodes.Add(oNode) oNode.Nodes.Add("") Any bit of help will be helpful. Thanks