Help is generally invoked from selections in the
Help
Menu of the MenuBar.
In addition,
on a component must invoke any context-sensitive help
for the component or its nearest ancestor with context-sensitive
help available.
Within DialogBoxes, applications
should provide context-sensitive help for the DialogBox
as a whole.
should switch into context-sensitive help mode if it is available.
In the context-sensitive help mode, the pointer shape changes to
show the mode, and help is provided for the next component that the
user selects, after which context-sensitive help mode is exited.