OmniAppKit.framework capable of custom Open/Save Dialog's?
 

Im very curious as to exactly what frameworks Apple's standard system wide "Open/Save Dialog's" use. I assume the Appkit.framework? If this is the case, are the OmniAppKit.framework suitable to use as a basis of designing custom Open/Save Dialog's which could ultimately be used as a complete replacement of Apple's Open/Save Dialog's for every application system wide?

Thanks