This demo demonstrates how you would go about taking manual control
of updates in a multi-tier application. With the advent of nested
datasets in D4, this method will be needed less than it was in D3.
However, you can use this method if:

  a) you don't want to use nested datasets for your master/detail tables
  b) you want to control updates for non-master/detail tables

This sample uses an upsized DBDEMO database ported to Interbase. This
database file is located in the data directory.