LOOK at the winapi winhelp
Public Declare Function WinHelp Lib "user32" Alias "WinHelpA" (ByVal hwnd As Long, ByVal lpHelpFile As String, ByVal wCommand As Long, ByVal dwData As Long) As Long
BOOL WinHelp(
HWND hwnd, // handle of window requesting Help
LPCTSTR lpszHelp, // address of directory-path string
UINT uCommand, // type of Help
DWORD dwData // additional data
Parameters
hwnd
Identifies the window requesting Help. The WinHelp function uses this handle to keep track of which applications have requested Help.
lpszHelp
Points to a null-terminated string containing the path, if necessary, and the name of the Help file that the Help application is to display.
The filename may be followed by an angle bracket (>) and the name of a secondary window if the topic is to be displayed in a secondary window rather than in the primary window. The name of the secondary window must have been defined in the [WINDOWS] section of the Help project (.HPJ) file.
uCommand
Specifies the type of help requested. For a list of possible values and how they affect the value to place in the dwData parameter, see the Remarks section.
dwData
Specifies additional data. The value used depends on the value of the uCommand parameter. For a list of possible values, see the Remarks section. Attitude is Everything