Steganography for OfficeXML file

The tool is a MFC application,and the tool used the method of Unknown parts and Unknown relationships to embed a file (image or text file) in a Office 2007 file(.docx,.pptx and .xlsx).You can use the tool as follow:
1、Select a operation that you want to do.
2、Select a Office 2007 file .
3、Select a file that you want to hide.Please note,the name of the file must be composed with letter or number.If you select the operation "Information Extracting",then you need not to select the file.
4、Click the button to embed or extract.
If you do the operation"Information Hiding",then after you click the "embed" button,the app will create a file in the same directory as your cover file, with the postfix “(steg)”. If you want to extract a file that been embedded in a Office 2007 file with this tool,select the operation"Information Extracting" and select the Office 2007 file ,you will get a file in the same directory as the Office 2007 file you select,with the postfix “(steg)”.