TBaseVirtualTree.AddChild Method

Creates and adds a new child node to given node.

function AddChild(Parent: PVirtualNode; UserData: Pointer = nil): PVirtualNode;

The new node will be created as last child of Parent and is returned as result.

Using AddChild is not recommended. The method is merely there for easier migration from TTreeview. The reason is that the 

method has to validate the node and does some other processing, which prevents the tree from utilizings its virtual 

paradigm. Important advantages will so disappear. If possible you should restructure your design and try to use the right 

way: via OnInitNode and OnInitChildren. 

InsertNode, OnInitNode, OnInitChildren

TBaseVirtualTree Class