The menu bar of the main help window contains a "Help" pulldown menu which in turn contains a number of options. The resource definition for this pulldown menu is included in the hmtailor.rc file provided with IPF, and illustrated in Figure "Help Pulldown Menu Definition".
When the user selects an item from the help pulldown menu, a message is generated, and is trapped by IPF and processed. Typically, this message causes IPF to query the application for the correct help panel. The message generated is dependent upon the pulldown menu item selected by the user.
Help For Help
When the user selects this item, IPF sends a WM_COMMAND message to the active application window, with the first parameter containing the ID_HELP_FOR_HELP identifier. The application's window procedure should process this message by sending an HM_REPLACE_HELP_FOR_HELP message containing the panel identifier of its own "Help for help" panel if one exists, or by sending an HM_DISPLAY_PANEL message with both parameters set to zero in order to display the default panel.
Extended Help
When the user selects this item, IPF responds by displaying the "Extended help" panel defined for the active application window in the help table. If no such help panel is defined for that window, IPF sends an HM_EXT_HELP_UNDEFINED message to the application (see Communication Between IPF and Applications (HM_EXT_HELP_UNDEFINED)).
Keys Help
When the user selects this item, IPF sends an HM_QUERY_KEYS_HELP message to the active application window. The application's window procedure should process this message by returning the panel identifier of its own "Keys help" panel in the return code to Presentation Manager.
Help Index
Selecting this item causes IPF to display the index of the current help library.