def write(name, type, data)
      case type
      when REG_SZ, REG_EXPAND_SZ
        data = data.to_s + "\0"
      when REG_MULTI_SZ
        data = data.to_a.join("\0") + "\0\0"
      when REG_BINARY
        data = data.to_s
      when REG_DWORD
        data = API.packdw(data.to_i)
      when REG_DWORD_BIG_ENDIAN
        data = [data.to_i].pack('N')
      when REG_QWORD
        data = API.packqw(data.to_i)
      else
        raise TypeError, "Unsupported type #{type}"
      end
      API.SetValue(@hkey, name, type, data, data.length)
    end
def write(name, type, data)
      case type
      when REG_SZ, REG_EXPAND_SZ
        data = data.to_s + "\0"
      when REG_MULTI_SZ
        data = data.to_a.join("\0") + "\0\0"
      when REG_BINARY
        data = data.to_s
      when REG_DWORD
        data = API.packdw(data.to_i)
      when REG_DWORD_BIG_ENDIAN
        data = [data.to_i].pack('N')
      when REG_QWORD
        data = API.packqw(data.to_i)
      else
        raise TypeError, "Unsupported type #{type}"
      end
      API.SetValue(@hkey, name, type, data, data.length)
    end
writer