Argument

 

context

   OpenVMS usage:context
   type:         longword
   access:       write only
   mechanism:    by reference
   Value that distinguishes between multiple, concurrent SORT/MERGE
   operations. The context argument is the address of a longword
   containing the context value. When your program makes its first
   call to a SORT/MERGE routine for a particular sort or merge
   operation, the context longword must equal zero. SORT/MERGE
   then stores a value in the longword to identify the operation
   just initiated. When you make subsequent routine calls for the
   same operation, you must pass the context value supplied by
   SORT/MERGE.