How can I use images provided by the iPhone OS?

First, let me state what brought this question about: I saw the green checkmark icon in this post and I would like to use it in my own application. However, since it looks so much like the UITableViewCellAccessoryDetailDisclosureButton my assumption is that this green checkmark icon is provided by the iPhone OS in some form or fashion.

So, my question is: how can I u开发者_开发知识库se the green checkmark icon and/or other OS-provided images in my own applications?

As a side question: where can I find a list of the OS-provided images (if they even exist)?

Thanks very much for any input :-)

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This is not one of the standard images. To see what you have available, you can add a UIBarButton in interface builder and try different system icons.