One more way to create/save stored process is to use "store" option. For example:
libname lib_name "<path>";
options MSTORED SASMSTORE = lib_name;
%macro new_macro / store;
/* Any code */
%mend;
Now macro new_macro is stored into sasmacr catalog in library lib_name.
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I think you are looking for the zipcitydistance function. It, and others, are described at: http://www.sascommunity.org/wiki/Driving_Distances_and_Drive_Times_using_SAS_and_Google_Maps
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