private String GetPlaceholderText(int placeholderId, CString cs){ String text = null; if(_ppt2007){ Sheet master = _sheet != null ? _sheet : _ppt.GetSlidesMasters()[0]; TextShape placeholder = master.GetPlaceholder(placeholderId); if(placeholder != null) text = placeholder.GetText(); //default text in master placeholders is not visible if("*".Equals(text)) text = null; } else { text = cs == null ? null : cs.GetText(); } return text; }