What are the general properties and methods of the TreeView and TreeNode objects, and what effects/purposes do they serve?

This is the second installment in the Gardener's Guide to the TreeView.  Advancing on what we learned in Part I, adding items to the TreeView, this new tutorial project presents the user with a form that publishes at runtime a wide variety of navigation and manipulation properties and methods of TTreeView, TTreeNodes and TTreeNode.

In detail, the following items are covered:

TTreeView
   Methods
      AlphaSort
      FullCollapse
      FullExpand
      LoadFromFile
      SaveToFile
   Properties
      AutoExpand
      HideSelection
      HotTrack
      ReadOnly
      ShowLines
      ShowRoot
      TopItem

TTreeNodes
   Methods
      Add
      AddFirst
      AddChild
      AddChildFirst
   Properties
      Count
      Items

TTreeNode
   Methods
      AlphaSort
      Delete
      DeleteChildren
      Collapse
      Expand
      GetFirstChild
      GetNextSibling
      GetNextChild
      GetNext
      GetNextVisible

Of particular note is the LoadFromFile and SaveToFile functionality of the TTreeView class.  A sample TreeView is included in the zip file with an RTV extension.  You can play around with creating your own TreeViews and save them for later use.

This tutorial has an advantage in that it not only describes in fair detail the purpose of each property and method in code comments, but also provides you with effectively a property editor for the TreeView.  Future parts of this tutorial will expand on that concept, and will delve into topics beyond the TreeView, though the core subject matter will remain constant.

I hope that these tutorials are of use to readers and programmers.  If you have any questions or comments about them, feel free to e-mail me at ghannodahn@icitadel.com.  The third part of this tutorial will incorporate a system to load data from a database table and populate the TreeView from it, or write the contents to a table.