enum _PRL_GRACEFUL_SHUTDOWN_CAPABILITIES {
  PGST_CAPABILITY_SHUTDOWN = 0x1,
  PGST_CAPABILITY_REBOOT = 0x2,
  PGST_CAPABILITY_SUSPEND = 0x4,
  PGST_CAPABILITY_HIBERNATE = 0x8,
  PGST_CAPABILITY_LOGOUT = 0x10
};