Most modern GUI applications have on-line hypertext help. In Windows 3.1, help is normally supplied in binary files which are read by an external program, which is itself accessed from within the application using Microsoft-supplied function calls. XView has provisions for simple context sensitive help, but no equivalent of the Windows 3.1 browseable help.
From version 1.30, wxWindows comes with wxHelp, a hypertext help system which may be invoked from wxWindows applications. However, a wxWindows program may specify that under Windows 3.1, WinHelp should be used instead of wxHelp. wxHelp may be seen as a 'last resort' if the GUI system does not have a native help facility.
Please see wxHelp and the separate wxHelp manual for further details.
wxWindows programmers may wish to follow the example of the wxWindows documentation, and prepare their manuals in a LaTeX form. The supplied Tex2RTF utility may then be used to generate online help in a variety of paper and on-line hypertext formats, including wxHelp and Windows Help.