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BOOK: Visual Basic 2005 Programmer's Reference
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Old February 23rd, 2007, 07:59 AM
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Default Catching events

I have three classes - class A, Class B and Class C
An instance of class A creates several instances of Class B, and each of these in turn creates several instances of Class C.

An instance of Class C raises an event that I want to handle in the Class A instance.

Can you suggest a good way to do this?



Old February 23rd, 2007, 10:19 AM
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Probably the most straightforward method would be to make B declare a similar event. When B catches the C's event, it raises its own event for A to catch.

Another option would be to declare an event handler in A and then have B use the AddHandler statement to make A's event handler directly catch the C events. This would mean B needs a reference to its A object so it can refer to that event handler. It's also more confusing so I'd stick with the first option if possible; it's a lot simpler.

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