?? ivolume.h
字號:
// IVolume.h : IVolume interface definition.
// Developer : Alex Chmut
// Created : 8/11/98
#ifndef _IVOLUME_H_
#define _IVOLUME_H_
// User-defined callback for volume change notification
typedef void (CALLBACK *PONMICVOULUMECHANGE)( DWORD dwCurrentVolume, DWORD dwUserValue );
////////////////////////////////////////////////////////////////////////
// IVolume interface
class __declspec(novtable) IVolume
{
public:
virtual bool IsAvailable() = 0;
virtual void Enable() = 0;
virtual void Disable() = 0;
virtual DWORD GetVolumeMetric() = 0;
virtual DWORD GetMinimalVolume() = 0;
virtual DWORD GetMaximalVolume() = 0;
virtual DWORD GetCurrentVolume() = 0;
virtual void SetCurrentVolume( DWORD dwValue ) = 0;
virtual void RegisterNotificationSink( PONMICVOULUMECHANGE, DWORD ) = 0;
};
#endif
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