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─────Microsoft Context-String Conventions───────────────────────────────────
 
     Certain context strings are defined by convention across the help
     databases for Microsoft applications. If you modify or replace
     Microsoft help databases, be sure to retain these context strings:
 
     Context      Associated
     String       Topic
 
     h.default    The default help topic, typically displayed when the
                  user requests help at the "top level" in the
                  application. The topic is generally devoted to
                  information on using help.
 
     h.contents   The help topic displayed when the user requests a
                  table of contents for a help database.
 
     h.index      The help topic displayed when the user requests an
                  index for a help database.
 
     Note that the h. prefix is used to begin each of the context
     strings above. Microsoft help systems consider context strings
     beginning with a specified character prefix to be "internal" or
     "constructed" help context strings. Except for the context strings
     listed above, these apply to menu items, error numbers, and so
     forth.
 
     The following character prefixes denote internal help context
     strings:
 
     Character   Description
 
     d.          Dialog box. Each dialog box is assigned a number. Its
                 help context string is d., followed by the number (for
                 example, d.12).
 
     e.          Error number. If a product supports the Microsoft
                 error-numbering scheme, it displays help for each
                 error using this prefix. For example, the context
                 e.P0105 refers to the Microsoft QuickPascal Compiler
                 error message number P0105.
 
     h.          Help item. Prefixes miscellaneous help context strings
                 that may be constructed or otherwise hidden from the
                 user. For example, most applications look for the
                 context string h.contents when Contents is chosen from
                 the Help menu.
 
     m.          Menu item. Context strings that relate to application
                 menu items are defined by their shortcut keys. For
                 example, the Exit selection on the File menu item is
                 accessed by ALT+F+X; the application looks for the
                 context string "m.F.X".
 
     n.          Message box. Each message box is assigned a number.
                 Its help context string is n., followed by the number
                 (for example, n.5).
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