[fpc-pascal] how to expand a set?

[wkitty42 at windstream.net]

what is the best/easiest way to increase the size of a set if the set is defined 
as the following?


   const
     CMaxCount  = 255;

   type
     TMsgAreas  = set of 0..CMaxCount;

   var
     MsgAreas   : TMsgAreas;


is a set of sets possible?
how is a set of sets defined?
how are the elements in the sets accessed?


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