Stacks are a series of Control Objects that all share the same command key. Link a stack together using the mapCommandTo** functions and its ready to go. It's easy and quick.
If your stack one or more Validation Control Objects they will always be executed when you trigger your stack. QCNative makes validation and application security easy.
Put Business Control Objects in your stack to access local and remote data. Then manipulate the data all you want. Each BCO is modular and reusable.