Creating a treeview node

I have a treeview from which I select a node, then click a button. That button adds the node to a treeview in another form. Now the node is there when I start up the form, but when I close and reopen it, its gone again. How can I keep it in the treeview?

Also, how can I name the node, now I use this code:

Code:

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Form2.Treeview1.Nodes(0).Nodes(0).Nodes.Add("5")

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It is gone, because it isn't saved. How do you create the list? (code please)

I think I found a solution, now I use booleans and it nearly works.