How can move up and move down selected item programmatically in treeview in c#

How can I move treelist-nodes within a bound treelist by code

1. Click up = Move node up
2. Click down = Move node down
3. Click right = Set the node as child (Parent node is the previous node)
4. Click left = Set the node to a higher Level

dev express treelist using how to move up and down and next and preview when i click an button

pls give me solution