The clean aperture for the buffer (type CFDictionary , containing the clean aperture width, height, and horizontal and vertical offset key-value pairs).
Available in Mac OS X v10.4 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)