HH_DISPLAY_INDEX command

Selects the Index tab in the Navigation pane of the HTML Help Viewer and searches for the keyword specified in the dwData parameter.

pszFile	dwData
Specifies a compiled help (.chm) file, or a specific topic within a compiled help file.	Specifies the keyword to select in the index (.hhk) file.

Example

HtmlHelp(
         hwnd,
         "cat.chm",
         HH_DISPLAY_INDEX,
         (DWORD)"meow") ;

The handle (hwnd) of the help window.