Description
int 
hw_mv ( int connection, array object_id_array, int source_id, int destination_id )
     Moves the objects with object ids as specified in the second
     parameter from the collection with id source_id
     to the collection with the id destination_id.
     If the destination id is 0 the objects will
     be unlinked from the source collection. If this is the last instance
     of that object it will be deleted. If you want to delete all instances
     at once, use hw_deleteobject().
    
     The value returned is the number of moved objects.
    
     See also hw_cp(),
     and hw_deleteobject().