Address_Of_Nth_Buffer
(Address_Of_Nth_Buffer(field,N) + Position_Of_Row_In_Buffer(field,row))
p = Address_Of_Nth_Buffer(field, buffer);
FIELD_CELL *data = Address_Of_Nth_Buffer(field, buffer);
result = Address_Of_Nth_Buffer(field, buffer);
FIELD_CELL *new_bp = Address_Of_Nth_Buffer(field, i);