Added extra notebook page for a container example. Added "correct" callbacks for events on trees and containers. Added status lines to the tree and container pages to display results of the callback events. Changed the tab name to reflect the widgets in the notebook pages.
Added extra notebook page for a container example.
Added "correct" callbacks for events on trees and containers.
Added status lines to the tree and container pages to display results of
the callback events.
Changed the tab name to reflect the widgets in the notebook pages.

OS2World/LIB-DynamicWindows,OS2World/LIB-DynamicWindows,OS2World/LIB-DynamicWindows