text: #ifndef _IOCTL
  #define _IOCTL
  
  // Define the ioctls for adding and removing ports.
  #define CTRL_CODE(function, method, access) \
                  CTL_CODE(FILE_DEVICE_NETWORK, function, method, access)
  
  #define IOCTL_TIMESTMP_REGISTER_PORT       CTRL_CODE( 0x847, METHOD_BUFFERED, FILE_WRITE_ACCESS)
  #define IOCTL_TIMESTMP_DEREGISTER_PORT     CTRL_CODE( 0x848, METHOD_BUFFERED, FILE_WRITE_ACCESS)
  
  
  #endif //_IOCTL
  