The DHCP_FILTER_RECORD structure contains information regarding a link-layer filter record.

 typedef struct _DHCP_FILTER_RECORD {
   DHCP_ADDR_PATTERN AddrPatt;
   LPWSTR Comment;
 } DHCP_FILTER_RECORD,
  *LPDHCP_FILTER_RECORD;

AddrPatt: This is of type DHCP_ADDR_PATTERN (section 2.2.1.2.89) structure and contains the address/pattern related information of the link-layer filter.

Comment: This is a pointer, of type LPWSTR, to a null-terminated Unicode string that contains the comment associated with the address/pattern. The maximum number of characters allowed in this string is 128, which includes the terminating null character.