| 
            plmkstrm
          ( | p_strm ); | 
      Creates a new stream and makes it the default.  Differs from using
      plsstrm, in that a free stream number is found, and returned.
      Unfortunately, I have to start at stream 1 and work upward, since
      stream 0 is preallocated.  One of the big flaws in the PLplot API is
      that no initial, library-opening call is required.  So stream 0 must
      be preallocated, and there is no simple way of determining whether it
      is already in use or not.
    
p_strm
          (PLINT_NC_SCALARReturned value of the stream number of the created stream.
      Redacted form: plmkstrm(p_strm)
    
This function is used in examples 1 and 20.