How to add a Close button

I am creating FlashHelp for an application that uses a touch screen; no keyboard or mouse is available to the user. When help is displayed, it takes over the entire window and provides no ability to close the window. I currently have set up help system to display a Contents and Print button on the toolbar. I need to add a close button so the user can close the help and return to the application. Any suggestions or instructions on how to do this are appreciated. Thanks!