NSButton method isn't working here

Hi there.
I have an Objective C application here, and I cannot seem to get the method below to actually have an affect on the button. Does anyone know why this could possibly be happening?
[downloadButton setBezelStyle:NSRecessedBezelStyle]; //works
[downloadButton setTitle:@"Downloading"]; //works
[downloadButton setState:0]; //doesn't work
Thanks in advance.
Ricky.

The setEnabled command isn't listed in NSButton documentation because it inherits this function from NSControl and so is not unique to NSButton. This is a really good lesson in Cocoa functionality - check the inheritance chain in "Inherits from" at the very top of the NSButton class reference and follow it backwards.
If you're looking for a functionality that you think should be in a class but you don't see it listed follow the inheritance chain and you'll probably find it there. Cocoa is a very "lived in" environment and most of the things you want to do with classes is already written in there because the need has come up before and has been added by someone. Often if you're working too hard in Cocoa it means you've missed some functionality in the class or you're using the wrong thing to do what you're doing. Looking up the chain will also sometimes show you a higher level object that does all the things you need instead of trying to force another object into that behavior.
My $.02,
=Tod

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If you want a picture
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Attachements:
For the really keen I have included 2 zip files
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If you are wondering where I got the names, concepts and PIN diagrams from see:
Elemental Design Patterns
By: Jason McColm Smith
Publisher: Addison-Wesley Professional
Pub. Date: March 28, 2012
Print ISBN-10: 0-321-71192-0
Print ISBN-13: 978-0-321-71192-2
Web ISBN-10: 0-321-71255-2
Web ISBN-13: 978-0-321-71255-4
All the best
David
Attachments:
Call parent node fault.zip ‏356 KB
Call parent node fault.zip ‏356 KB

Hi tst,
Thankyou for your reply. Can you have a look at my comments below on the points you make.
1) Have to disagree on that one. The help is unfortunately not clear. The part you quote in your reply only indicates that the VI you are applying "Call Parent Node" to must be dynamic dispatch. There is nowhere in the help it actually states that the call parent node applies to the VI of the block diagram it is placed into. Basically case 2 in my example fulfills all that the help file requires of it. The dynamic dispatch VI's operation are part of a class that inherits from a given ancestor. Operation 2 for Reverted behaviour is a child VI that is dynamic dispatch and has the same name as the ancestor VI (operation2). The help is missing one important piece of information and should be corrected.
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