Nodes Collection Method: AddEx 
Purpose
Adds a new Node object to the Nodes collection, and sets the node’s type.
Syntax
The Add method has the syntax:
Object AddEx(Variant vaRelative,
CTreeAddType Relationship,
String Key,
Variant Text,
Long Image,
Long SelectedImage,
CTreeNodeType Type)
Description
This method is the same as the Nodes collection’s
Add method, except that you can pass the type of the new node to the method as additional parameter.