*/
protected static HSSFComment findCellComment(Sheet sheet, int row, int column){
HSSFComment comment = null;
HashMap txshapes = new HashMap(); //map shapeId and TextObjectRecord
for (Iterator it = sheet.getRecords().iterator(); it.hasNext(); ) {
RecordBase rec = (RecordBase) it.next();
if (rec instanceof NoteRecord){
NoteRecord note = (NoteRecord)rec;
if (note.getRow() == row && note.getColumn() == column){
TextObjectRecord txo = (TextObjectRecord)txshapes.get(new Integer(note.getShapeId()));
comment = new HSSFComment(note, txo);