You can display the Help Topics dialog box by calling the WinHelp function with the HELP_FINDER command. The Help Topics dialog box lets the user select topics to display by viewing the titles of the topics, the keywords associated with the topics, or the words and phrases found in the topics. Applications typically display the Help Topics dialog box when the user chooses a command, such as Help Topics, from the Help menu. An application may also display this dialog box if the user presses the F1 key when no specific window, control, or menu in the application has the focus or is active.
In the past, applications have used the HELP_CONTENTS and HELP_INDEX commands with the WinHelp function to display the Contents topic and the keyword index of the help file. These commands are no longer recommended. Use the HELP_FINDER command instead.