When I open a VBA-File directly with notepad or notepad++, I only see a bunch of weird characters.
How did I open a VBA-File:
Do someone know a way to view the source code correctly? Using dll or replace characters, etc...
The .bin is itself a Zip file that contains OLE Structured Storage/BIFF documents that are somewhat non-trivial to interact with.
http://www.codeproject.com/Articles/15216/Office-2007-bin-file-format
If Word is available on the machine running your application you can use it's COM Automation features to export VBA Projects as plain-text files.