track of what's going on, <CODE>
GenDocumentClass</CODE>
 has a byte-length field, <CODE>
GDI_operation</CODE>
. If the document control is in the midst of handling a user action for a given document, it will set the <CODE>
GDI_operation</CODE>
 byte accordingly. The current operation is a member of the <CODE>
GenDocumentOperation</CODE>
 enumerated type. This type has the following possible values:</P>
<DL>
<DT>
GDO_NORMAL</DT><DD>
<A NAME="IX_GDO_&ldots;">
 </A>
This is the usual setting. If the document 