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One of the crucial shortcomings with the Help systems you have looked at is that they are all designed to provide fine-grained reference information about specific windows and controls. As I described earlier, Help usually fails miserably when it tries to walk the user through a long, involved task. However, better Help is possible. What s needed is a change to how Help is designed and integrated in applications. Application-embedded support represents that change. Quite simply, embedded Help is user assistance that is a first-class member of an application. It s designed as part of the software, not added to the software after it s complete. Embedded Help provides far greater user assistance, but also requires far more development work. Some examples of embedded Help include the following: Process-oriented. Some applications reserve a portion of their interface for continuous tip messages, or use a tiny information icon that a user can click for more information about the current task. This type of Help trains users as they work, and is used to great effect in fairly complex computer games (like the popular hit The Sims). Wizards are another example of process-oriented Help. Stationary embedded. This is the most common form of embedded Help, and it refers to the content added to dialog boxes to explain options (affordances) and actual embedded Help windows.

Agents. This is one of the most advanced and time-consuming types of embedded Help. It was pioneered largely by Microsoft in Microsoft Office (and later abandoned). Microsoft s attitude toward agents is extremely schizophrenic it provides tools to make it easy for all developers to use this level of support, but it only occasionally devotes the intense coding time needed to integrate it into its flagship applications. Bidirectional. To some, this is a holy grail of embedded Help, but it s rarely achieved, and usually only in a primitive form. Essentially, one of the critical drawbacks with Help is that it s cut off from the applications in two ways. Not only does the user have to leave the application to read most Help files, but once the appropriate information is found in the Help file, the user has to perform the actual work. There s no way for the Help file to act on the user s behalf, and actually show the user how to do what is needed. Some Help files do provide rudimentary Show Me links that can prompt the application to display the appropriate window, but this communication is difficult and fragile. With bidirectional Help, Help can perform the necessary task once it determines what the user needs.

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In Listing 8-9, you can see that you create a VBox, which means that the widgets contained within it are laid out horizontally: // create a new vbox and add the sub controls let vbox = new VBox() vboxAdd(label) vboxAdd(button) You can see the complete example in Listing 8-9; executing the code in these listings produces the image shown in Figure 8-10 Listing 8-9 A Simple Example of a GTK# Application open Gtk let main() = // initalize the GTK environment ApplicationInit().

Affordances are the visual clues designed to demystify a complex application. For example, Windows uses brief descriptions to provide a little information about your computer s Internet settings, as shown in Figure 22-14.

A time may come when you want to remove a hard drive from your Windows Home Server, either because you suspect that there might be a problem with it or because you want to replace it with a larger and possibly faster hard drive.

Figure 22-14. A dialog with affordances Help and affordances represent a bit of a paradox. Nothing can clarify a confusing dialog box more than a couple of well-placed words or icons. On the other hand, users often ignore descriptions, error messages, or anything else that requires reading. They either try to figure out the task on their own or, in the case of an error, repeat the task a few times and then give up.

// create the window let win = new Window("GTK# and F# Application") // set the windows size win.Resize(400, 400) // create a label let label = new Label() // create a button and subscribe to // its clicked event let button = new Button(Label = "Press Me!") button.Clicked.Add(fun _ -> label.Text <- "Hello World.") // create a new vbox and add the sub controls let vbox = new VBox() vbox.Add(label) vbox.Add(button) // add the vbox to the window win.Add(vbox) // show the window win.ShowAll() // close the event loop when the window closes win.Destroyed.Add(fun _ -> Application.Quit()) // start the event loop Application.Run() do main()

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