[This is preliminary documentation and subject to change.]
The HelpTopic property, retrieved by calling the IAccessible::get_accHelpTopic method, retrieves details about a Help file that provides information about an object. This is provided in the form of a string that represents the path to the Help file and a value identifying the topic of interest.
The retrieved values can be used with the Win32 WinHelp function to display a help topic associated with the object.
The path name retrieved might be a network path (like "\\network\share\directory\filename.ext") or a Uniform Resource Locator (URL) to an Internet resource (like "http://www.microsoft.com/enable/helpfile.htm").
See the Windows® 95 SDK documentation on parsing paths for more information.