Flex 3 cookbook examples does not

I use several of the examples in the Flex 3 Cookbook by O'Reilly.  In particular, I want to use examples 6.6 and 6.7.  However, when I try to compile, I get the following error: 1046: Type was not found or is not a compilation constant: ColumnSelectedEvent.

Did somebody get these examples to work?  I can post the code if necessary.

Thank you

Lee

Looks like the ColumnSelectedEvent has not been imported.

Tags: Flex

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