Use OpenDocwin to open an existing document into a new window. You have to specify its file name and label.
You can also open documents and place them in windows that belong to other applications. For details, see the Opening documents in external windows topic.
When a document window is opened through the user interface, Imagenation sends a NotifyIM -- NewDocwin notification, if it has been registered. Its data syntax provides the docwinID of the new document window.
See also
Opening documents: alternatives