Check that the ID is not NIL.
If the item is structured get the noticeboard modified count.
If the item is primitive get the item’s modified count.
Return a pointer to the appropriate modified count.

For structured items, this value is incremented each time an item in the noticeboard is updated.

For primitive items, if this value is even then the associated values are not currently being updated. If it is odd then they are currently being updated. The total number of updates to this item is half the value of the modified count.

An "update" is an update of an item’s value, shape or size.

Note that when item data is accessed directly via pointer then the modified count is not updated unless this is done explicitly using the NBS_INC_MODIFIED routine.

(Int) = NBS_GET_MODIFIED_POINTER (ID,POINTER,STATUS)

ID = INTEGER (Given)

POINTER = INTEGER (Returned)

STATUS = INTEGER (Given and returned)