Method for removing DOC,XLS,... Metadata (Author...)

Hi, we need a method to remove properties/metadata information (author, comment.,...) from MS Office files. It needs to support both, old Office formats (at least XLS, PPT, DOC) and new ones (at least DOCX, PPTX, XLSX). You can see an example on how to do it manually at [login to view URL] However, we need a method for it. The method needs to have 1 parameter (the file name) and return true (if successful) or false. We prefer having a method in C# but you can also uise C++, Delphi, C, VB,... as long as we can access your method (e.g. via a DLL). After the project we need to receive the code as well and of course the right to use it. Best greetings, Sven