Return Values
   Returns a control constant; one of WIN32_SERVICE_CONTROL_CONTINUE,
   WIN32_SERVICE_CONTROL_INTERROGATE,
   WIN32_SERVICE_CONTROL_PAUSE,
   WIN32_SERVICE_CONTROL_STOP,
   WIN32_SERVICE_CONTROL_HARDWAREPROFILECHANGE,
   WIN32_SERVICE_CONTROL_POWEREVENT,
   WIN32_SERVICE_CONTROL_SESSIONCHANGE.