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Documentation of two types of permutation algorithms
...You will need to enable macros to run the algorithms. You can view the VBA code of each algorithm from the developer module house inside Microsoft Excel.
The lexigraphical algorithm is faster because it supports multi-threading.
Developer tools for Visual Basic for Applications in Excel. Import, export and delete modules using a user-friendly UI. Also provides tools for translations using the VBAGettext components (http://vbagettext.sf.net). These tools integrate as a "Dev Tools" menu into the Visual Basic Editor (VBE).