Date: 06/15/05 (Code WTF)    Keywords: no keywords

if ( o->SearchID() == ID_BUTTON ||
     o->SearchID() == ID_TPV_DEFBUTTON ||
     o->SearchID() == ID_TPV_NOTIFY_BUTTON ||
      (((UIW_BUTTON *)o)->value >= PM_CONTROL_LOWER &&
      ((UIW_BUTTON *)o)->value <= PM_CONTROL_UPPER) ||
        (((UIW_BUTTON *)o)->value >= PM_NOTEBOOK_LOWER &&
        ((UIW_BUTTON *)o)->value <= PM_NOTEBOOK_UPPER) )
  ;
else 
  PM_ENTRY(o).setNonSelectable(); 

Source: http://www.livejournal.com/community/code_wtf/9931.html