get offset of a member of a structure by the member name id - structure type ID member_name - name of structure member returns: -1 if bad structure type ID is passed or no such member in the structure otherwise returns offset of the specified member. NOTE: Union members are, in IDA's internals, located at subsequent byte offsets: member 0 -> offset 0x0, member 1 -> offset 0x1, etc...long get_member_offset(long id, string member_name);