showHelp method

[This documentation is preliminary and is subject to change.]

Applies to: desktop apps only

Displays a Help file. This method can be used with Microsoft HTML Help.

This method is not supported for Metro style apps using JavaScript.


HRESULT retVal = object.showHelp(helpURL, helpArg);

Standards information

There are no standards that apply here.


helpURL [in]

Type: BSTR

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.

Return value


If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.


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 returnValue to false.

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.

See also

About the Pop-up Blocker



Build date: 6/6/2012

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