1  #include <CarbonCore/Components.h>
2  #include <CoreAudio/AudioHardware.h>
3  
4  extern "C"{
5  OSStatus AudioHardwareServiceGetPropertyData(AudioObjectID inObjectID, const AudioObjectPropertyAddress *inAddress, UInt32 inQualifierDataSize, const void *inQualifierData, UInt32 *ioDataSize, void *outData);
6  Boolean AudioHardwareServiceHasProperty(AudioObjectID inObjectID, const AudioObjectPropertyAddress *inAddress);
7  OSStatus AudioHardwareServiceIsPropertySettable(AudioObjectID inObjectID, const AudioObjectPropertyAddress *inAddress, Boolean *outIsSettable);
8  OSStatus AudioHardwareServiceSetPropertyData(AudioObjectID inObjectID, const AudioObjectPropertyAddress *inAddress, UInt32 inQualifierDataSize, const void *inQualifierData, UInt32 inDataSize, const void *inData);
9  }