Displays a Help file. This method can be used with Microsoft HTML Help.
HRESULT retVal = object.showHelp(helpURL, helpArg);
- helpURL [in]
BSTR that specifies the URL of the file to be displayed as help.
- helpArg [in, optional]
VARIANT that specifies a string or integer that indicates a context identifier in a Help file.
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
There are no standards that apply here.
Only files of types .chm and .htm are supported as help files.
When implementing this method, a second Help dialog box appears when the user presses F1 or clicks Help on the menu bar. You can prevent the default Help dialog box from appearing by setting IHTMLEventObj::returnValue to
This method must use a user-initiated action, such as clicking on a link or tabbing to a link and pressing enter, to open a pop-up window. The Pop-up Blocker feature in Microsoft Internet Explorer 6 blocks windows that are opened without being initiated by the user.
Build date: 11/12/2012