Arguments

 

context

   OpenVMS usage:context
   type:         longword (unsigned)
   access:       write only
   mechanism:    by reference
   Value identifying the data stream that DCX$EXPAND_INIT
   initializes. The context argument is the address of a longword
   containing this value. After DCX$EXPAND_INIT initializes this
   context value, you should not modify it. You can define multiple
   context arguments to identify multiple data streams that are
   processed simultaneously.
 

map

   OpenVMS usage:address
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference
   Compression/expansion function (created by DCX$MAKE_MAP). The map
   argument is the address of the compression/expansion function's
   virtual address.

   The map argument must remain at this address until data expansion
   is completed and context is deleted by means of a call to
   DCX$EXPAND_DONE.