Substitute controls of another size. The associated value is a Boolean value. If the filter cannot provide a view for the requested size and a fallback is allowed, the filter can use controls of a different size.
Available in Mac OS X v10.5 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)