From the NannyMUD documentation

LAST CHANGE

2001-08-12

FUNCTION

NAME
        changed_shape_hook - 


AVAILABILITY
	/obj/player

DESCRIPTION
	This function is called when the HP or SP of the player
	changes.

	ARGUMENTS

	changed_shape_hook(
	  ({ Hit points,
	     Old hit points,
	     Spell points,
	     Old spell points
	  }),
	  the player
	)


SEE ALSO
        block_changed_shape_hook in hooks/block_changed_shape_hook