This code accompanies a walk-thru tutorial, Extending C# Listview with Collapsible Groups (Part I) in which I build out a basic extenstion of the common Windows Forms ListView control. In the article I discuss:

• Adding expandable/collapsible groups with header columns to the ListView
• The use of Inner Classes to extend and manage the child collection of ListViewItem Groups
• A few basic WinApi calls to menage vertical and horizonal scrollbars within the nested lists