right thing, using Use SCREAMING_SNAKE_CASE, after extends and includes. Sample:  

```
class Metasploit3 < Msf::Post

  include Msf::Post::File
  include Msf::Post::Windows::Priv
  include Msf::Post::Windows::Services

  START_TYPE = {
    "demand"    => "SERVICE_DEMAND_START",
    "boot"      => "SERVICE_BOOT_START",
    "auto"      => "SERVICE_AUTO_START",
    "disabled"  => "SERVICE_DISABLED",
    "system"    => "SERVICE_SYSTEM_START"
  }

  def initialize(info={})

```