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Duncan Mackenzie

Posts: 689
Nickname: duncanma
Registered: Aug, 2003

Duncan Mackenzie is the Visual Basic Content Strategist at msdn.microsoft.com
You learn something new everyday... Posted: Aug 2, 2003 1:13 AM
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This post originated from an RSS feed registered with .NET Buzz by Duncan Mackenzie.
Original Post: You learn something new everyday...
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Feed Description: Duncan is the Visual Basic Content Strategist at MSDN, the editor of the Visual Basic Developer Center (http://msdn.microsoft.com/vbasic), and the author of the "Coding 4 Fun" column on MSDN (http://msdn.microsoft.com/vbasic/using/columns/code4fun/default.aspx). While typically Visual Basic focused, his blogs sometimes wanders off of the technical path and into various musing of his troubled mind. 		Latest .NET Buzz Posts
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Ok, I know that Paul knew this, but did anyone else notice that the VB.NET Try...Catch syntax includes a 'when' clause?
    Try
   [ tryStatements ]
[ Catch [ exception [ As type ] ] [ When expression ] 
   [ catchStatements ] ]
[ Exit Try ]
...
[ Finally
   [ finallyStatements ] ]
End Try
    When
    Optional. A Catch statement with a When clause will only catch exceptions when expression evaluates to True. A When clause is only applied after checking the type of the exception, and expression may refer to the identifier representing the exception.
I never did! I can't think of a good use for it right at this moment, but I'm still shocked that I never noticed it before... now what to do with it?

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