I'm not sure what to say here... probably nothing. ;) I cannot grasp what you're really talking about and my cynicism meter goes up when people start throwing out large CS words. What's wrong with an if statement?
Can you elaborate more on what you're trying to do? It sounds like:
A (mainscreen) -> B (some dynamic data) -> C (data entry) -> B|C
That right? If so, what does B do differently when it doesn't come from A?
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