 we'll send a 
   <CODE>MSG_VD_CLOSE</CODE> to the ViewerDialog object.  
   It will do some clean-up work before closing down.</P>

<IMG SRC="vdialog.gif" ALT="[ViewerDialog screen shot]" WIDTH="648" HEIGHT="204">

<PRE>
@include &lt;viewer.goh&gt;

@class MyViewerDialogClass, ViewerDialogClass;

/* The following messages are utilities; we added them to help out 
   with some VILFile library duties */
  @message word			MSG_MVD_OPEN_DOCUMENT( DocumentInfo *doc );
  @message void                 MSG_MVD_CLOS