#define is_unseen(mp,msgnum) ((mp)->msgstats[(msgnum) - mp->lowoff] & SELECT_UNSEEN)
#define unset_unseen(mp,msgnum) ((mp)->msgstats[(msgnum) - mp->lowoff] &= ~SELECT_UNSEEN)
#define set_unseen(mp,msgnum) ((mp)->msgstats[(msgnum) - mp->lowoff] |= SELECT_UNSEEN)
#define is_unseen(mp,msgnum) ((mp)->msgstats[(msgnum) - mp->lowoff] & SELECT_UNSEEN)
#define unset_unseen(mp,msgnum) ((mp)->msgstats[(msgnum) - mp->lowoff] &= ~SELECT_UNSEEN)
#define set_unseen(mp,msgnum) ((mp)->msgstats[(msgnum) - mp->lowoff] |= SELECT_UNSEEN)