# File lib/windows/sys/cpu.rb, line 91
    def self.freq(cpu_num = 0, host = Socket.gethostname)
      cs = BASE_CS + "//#{host}/root/cimv2:Win32_Processor='cpu#{cpu_num}'"    
      begin
        wmi = WIN32OLE.connect(cs)
      rescue WIN32OLERuntimeError => e
        raise Error, e
      else
        return wmi.CurrentClockSpeed
      end
    end