Unlike the Tree icon view, however, separate Collapsed and Expanded icons/bit maps are not used. Instead, if an item is a parent, the icon or bit map that represents that item contains the same type of visible indication that is placed in a separate icon/bit map in the Tree icon view to show that an item can be collapsed or expanded. In this way, the icon or bit map that represents the parent item can serve a dual purpose and thus preserve space on the screen, an important consideration if the text strings used to describe items become too long.

The container control does not provide default icons or bit maps for the Tree name view. To display your own Collapsed and Expanded icons or bit maps, specify their handles using the hptrCollapsed and hptrExpanded fields of the TREEITEMDESC data structure for icons, and the hbmCollapsed and hbmExpanded fields for bit maps. Also, you can use the slBitmapOrIcon field of the CNRINFO data structure to specify the size, in pels, of these Collapsed and Expanded icons and bit maps.