For each column, get the name, type, format, informat, and label. 
   do column=1 to ncols;
      call send (vecid, '_getName',
                 column, colname);
      call send (vecid, '_getType', column,
                 type);
      call send (vecid, '_getFormat',
                 column, format);
      call send (vecid, '_getInformat',
                 column, informat);
      call send (vecid, '_getLabel',
                 column, label);