On Saturday, 24 February 2018 at 13:50:16 UTC, FrankLike wrote: > #define IOCTL_NDIS_QUERY_GLOBAL_STATS _NDIS_CONTROL_CODE(0, > METHOD_OUT_DIRECT) > > use alias or enum,how to do? neither. those are little functions. auto IOCTL_NDIS_QUERY_GLOBAL_STATS () { return _NDIS_CONTROL_CODE(0, METHOD_OUT_DIRECT); }