Okay, this should work for the case when Word isn't closed. From the docs:

Named Objects

Although you can usually specify an integer value with the Item method, it may be more convenient to return an object by name. The following example switches the focus to a document named Sales.doc.

Documents("Sales.doc").Activate
[download]

You know the file name from opening, so when it doesn't return a valid Document object, that would indicate it's closed. Eh... in theory :)

/J