The DRS_MSG_NT4_CHGLOG_REPLY union defines the response messages received from the IDL_DRSGetNT4ChangeLog method. Only one version, identified by pdwOutVersion^ = 1, is currently defined.
typedef
[switch_type(DWORD)]
union {
[case(1)]
DRS_MSG_NT4_CHGLOG_REPLY_V1 V1;
} DRS_MSG_NT4_CHGLOG_REPLY;
V1: The version 1 reply.