AT_ERRCOUNT ART_mark_visible(
        HIGEAR hIGear, 
        ART_MARK_INDEX hMarkIndex, 
        BOOL fVisible
);

HIGEAR   hIGear; /* HIGEAR handle of image */
AT_ERRCOUNT  nErrcount; /* tally of IG errors on  */
/* stack    */
ART_MARK_INDEX  hMarkIndex; /* index to current mark */
ART_MARK_ATTRIBUTES ma; /* structures for   */
/* attributes of current  */
/* mark    */
nErrcount = ART_mark_query(hIGear, hMarkIndex, &ma);
nErrcount = ART_mark_is_visible(hIGear, hMarkIndex, 
fVisible);
if (fVisible == TRUE && ma.dwType == 10){ 
/* if an attach-a-note mark is visible  */
nErrcount = ART_mark_visible(hIGear, hMarkIndex, 
FALSE); 
/* make it invisible    */
}