TVSelected - returns a handle to the current node in the tree. This node is also selected. If there is no such node in the tree, then 0 is returned. By assigning a descriptor of some node to this property, thereby it can be made current (other selected ones are no longer selected);

OnTVSelChanging - the event occurs before the node is allocated. The event handler can cancel the selection operation by returning true, and thereby prevent the selection of any nodes in the tree;

OnSelChange - this event is triggered to view the tree after changing the currently selected node;

TVRightClickSelect - this property determines for the tree window whether right-clicking on an unselected node will make it selected;

TVDropHilighted and TVDropHilited are synonyms for the same property. Return (and set) a node that is designated (and visually rendered differently) as the target node for dropping an object or node being "dragged" by the mouse (drag and drop operation);

TVRoot - descriptor of the first top-level node (0, only if the tree is empty);

TVFirstVisible - returns (and allows to set) the first visible node in the client side of the tree;

TVIndent - the size (in pixels) of the padding of child nodes in relation to the parent. Allows you to set the desired value other than the default;