HtmlHelp( Filename, ID )
Filename – Filename of the help file to use. This parameter is required.
ID – Topic ID to jump to. If this parameter is omitted the help contents page is shown.
This function will open a Compiled HTML Help (.chm) file and display a given topic or the contents page.
Note
CHM support requires Internet Explorer 4 or better. All versions of Windows from Millennium upward (including Windows 2000, XP and Server 2003) support this by default.