Use the PrevNode property to get the previous sibling node. Use the NextNode property to get the next sibling node. Use the FirstNode property to get the first child node. Use the Visible property to hide a node. Use the NextVisibleNode property to get the next visible node. Use the PrevVisibleNode property to get the previous visible node. If there is no previous tree node, the PrevNode property returns a null reference (Nothing in Visual Basic).