Context Sensitive Help
On-line context sensitive help is an implementation of Apple’s guidelines of giving the user extra help without referring him to external documentation. By the very nature of context sensitive help, it must be initiated from within the program. We suggest that you implement context sensitive help in two steps: (1) When the user hits ‘Command-?’, convert the pointer to a “?”. (2) When the user selects anything on the desk top with the “?” pointer: an icon, a menu item, or a field in a document, make your program call the Help desk accessory and passes it a parameter that indicates which message should be displayed. (See figure 7, Extended Alerts)
There are three ways in which users can activate the Help desk accessory: (1) From the Apple Menu, (2) using ‘Command-?’ if you have implemented Help In Context and, (3) pressing the Help button in an alert box if you have implemented Extended Alerts.