Currently the treeview items do not change selection when back or forward buttons are clicked. The DoSync function also needed to be changed because the paths to the htm files in the .chm don't line up with the path to the .chm, especially if the .chm is not in the same path as hh.exe.
-- v2: hhctrl.ocx: Selection of treeview items in the content tab should reflect web browser page.