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How do I get the first and last nodes in the treeview?

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Post time: 2020-3-22 16:30:02
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How do I get the first and last nodes in the treeview?
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Post time: 2020-7-1 01:15:01
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long ll_Handle
treeviewitem ltvi_item
ll_handle=tv_Tree.finditem(RootTreeItem!, 0)
ll_Handle is the handle of the first node.
tv_Tree.getitem(ll_Handle,ltvi_item)
ltvi_item is the information of the first node
The tail node is not easy to judge, only find the last node of level 1 through finditem, and then find its last child node,
Until it is not found, then this node is the last node.
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