nstantiate an object of FileOpenControlClass, a class defined by 
the Viewer library, which allows the user to select a document.
The Viewer library will then start up another library which will allow 
the user to view and edit the document--a VILFile 
library exists for each document type.  If you are defining a new kind of 
document to be compatible with the Viewer library, you will need 
to write a corresponding VILFile library.  
</P>

<P>
Before embarking on this task, consider if it's appropriate.  Do