rdinarily, the application will not look at the <CODE>
GenDocumentClass </CODE>
instance data. If the program defines a subclass of <CODE>
GenDocumentClass</CODE>
, the subclass's methods should use only the subclass's instance data.</P>
<P>
There is only one attribute which the program should change at run-time, and that is the GDA_PREVENT_AUTO_SAVE bit of the <CODE>
GDI_attrs</CODE>
 field. This bit can be changed with the messages <CODE>
MSG_GEN_DOCUMENT_DISABLE_AUTO_SAVE</CODE>
 and <CODE>
MSG_GEN_DOCUM