Steganography with OOXML (.docx file)---based styles file

If you have had some research on the new format of Office 2007/2010,the OOXML format,then you may interest in the tool that I refer to in this question.I will be glad you can tell me some information about OOXML files.
This tool,adopt the method of styles file,can be used to hide some information in a OOXML(.docx) file.When you use the tool,you can embed or extract the information with the selection of needed file,and you can see the result of the app in the "Result".
You can get the tool by visiting the site:http://www.putlocker.com/file/C2728C68E9BCF845[^]
Welcome your guys to download the tool and if possible feedback me so that I can develop my app.And,I hope,someone can give me some suggestions.