To include a header file in a project file

  1. Open a project (.hhp) file, and then click HTML Help API Information.

    Adds or removes map, alias and text pop-up files that are used by the program calling into the HtmlHelp API.
  2. On the Map tab, click Header File.

  3. Locate the header (.h) file you want to include.

  4. Save the project.

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