WIN32_SERVICE_BOOT_START | 
      0x00000000 | 
      
       A device driver started by the system loader. This value is valid only for driver services.
       | 
     
     
      WIN32_SERVICE_SYSTEM_START | 
      0x00000001 | 
      
       A device driver started by the IoInitSystem function. This value is valid only for driver services.
       | 
     
     
      WIN32_SERVICE_AUTO_START | 
      0x00000002 | 
      
       A service started automatically by the service control manager during
       system startup.
       | 
     
     
      WIN32_SERVICE_DEMAND_START | 
      0x00000003 | 
      
       A service started by the service control manager when a process calls the
       StartService function.
       | 
     
     
      WIN32_SERVICE_DISABLED | 
      0x00000004 | 
      
       A service that cannot be started. Attempts to start the service result in
       the error code WIN32_ERROR_SERVICE_DISABLED.
       |