On Thursday, 2 November 2017 12:48:27 UTC, JJ  wrote:   
   > On Wed, 1 Nov 2017 16:00:42 -0700 (PDT), JRS wrote:   
   > >   
   > > I'm thinking of ZIP compression, but the type and efficiency are not   
   > > important; but both packing and unpacking must use native windows   
   > > features.   
   >   
   > While the Windows built in ZIP feature is accessible from a batch file, it's   
   > impossible to know when the un/packing process actually ends.   
      
   For the envisaged ZIP size, the unpacking will be near enough   
   instantaneous.  The result will not be used electronically-   
   immediately, but only manually-soon.   
      
   --   
     (c) John Stockton, near London, UK.  Using Google, no spell-check. |   
    Mail: J.R.""""""""@physics.org                                      |   
      
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