Gerard,

When you add a new node in the TreeView, the function Add returns an object for the new added node. Using this object you have to set the parent node property Expanded to .T., in this case the subnodes will appear and you can select the node. Try this after you add a node:
oNode.Parent.Expanded = .T.
oNode.Selected = .T.

For editing, i had the same problem as you and i still don,t know how to proceed.

Ricardo Pôssas