Carbon will fully support Navigation Services. Apple strongly encourages you to begin using Navigation Services in your current Mac OS development efforts, because Carbon will not support the Standard File Package.
To assist in the transition, Navigation Services 1.0 is compatible back to System 7.5.5. Apple will also provide source code that maps many Standard File Package calls to their Navigation Services counterparts. Note, however, that this code provides an interim solution only--you will eventually need to adopt Navigation Services.
NavAskDiscardChanges
NavAskSaveChanges
NavChooseFile
NavChooseFolder
NavChooseObject
NavChooseVolume
NavCompleteSave
NavCustomAskSaveChanges
NavCustomControl
NavDisposeReply
NavGetDefaultDialogOptions
NavGetFile
NavLibraryVersion
NavLoad
NavNewFolder
NavPutFile
NavServicesCanRun
NavTranslateFile
NavUnload