helpURL
This parameter specifies an absolute or relative URL to a web page that contains help documentation.
If you set this parameter, the Help button and a Help menu item to access the URL become available in the viewer.
Clicking the button or the menu activates the URL. If no URL is specified, neither the button nor the menu item is displayed.
You can use the helpTarget parameter to specify how the web page is opened.
Sample syntax
<param name="helpURL" value="http://www.mysite.com/help.html" />
Default setting: N/A