I could use some help figuring out how to use the treeview control.

Take a look at http://msdn.microsoft.com/library/devprods/vs6/vbasic/cmctl198/vbobjtreeview.htm

Thanks for the link. I finally found the following page, which offers a wizard for the treeview control. This wizard writes the necessary code to populate the treeview nodes.
http://support.microsoft.com/support/kb/articles/q163/5/11.asp