# File lib/spreadsheet/workbook.rb, line 231
   def store_boundsheet(sheet_name, offset)
      name   = 0x0085
      length = 0x07 + sheet_name.length

      grbit = 0x0000
      cch   = sheet_name.length

      header = [name, length].pack("vv")
      data   = [offset, grbit, cch].pack("VvC")

      append(header, data, sheet_name)
   end