shot that bounces

[rbmartin]

While watching a game this past weekend (H.S. rules), a player from team A rebounds a missed shot under team B's basket with about 1 second remaining in the period. He turns and heaves a shot toward his own basket, which falls short, but almost goes thru the basket on the bounce.
Had that ball went thru, would that shot counted?
If it makes any difference, the bounce occurred after the horn.