Click here to Skip to main content
13,257,667 members (53,003 online)
Click here to Skip to main content


83 bookmarked
Posted 16 Nov 1999

Volume Manipulation Classes

, 16 Nov 1999
Volume manipulation classes.
// VolumeOutWave.h : Module interface declaration.
// IVolume implementation for wave audio output device
// Developer : Alex Chmut
// Created : 8/11/98
#pragma once
#include "IVolume.h"

class CVolumeOutWave
	: public IVolume

// IVolume interface
	virtual bool	IsAvailable();
	virtual void	Enable();
	virtual void	Disable();
	virtual DWORD	GetVolumeMetric();
	virtual DWORD	GetMinimalVolume();
	virtual DWORD	GetMaximalVolume();
	virtual DWORD	GetCurrentVolume();
	virtual void	SetCurrentVolume( DWORD dwValue );
	virtual void	RegisterNotificationSink( PONMICVOULUMECHANGE, DWORD );


	bool	Init();
	void	Done();

	bool	Initialize();
	void	EnableLine( bool bEnable = true );

	// Status Info
	bool	m_bOK;
	bool	m_bInitialized;
	bool	m_bAvailable;

	// Mixer Info
	UINT	m_uMixerID;
	DWORD	m_dwMixerHandle;

	DWORD	m_dwLineID;
	DWORD	m_dwVolumeControlID;
	int		m_nChannelCount;
	HWND	m_hWnd;
	static	LRESULT CALLBACK MixerWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
	void	OnControlChanged( DWORD dwControlID );

	DWORD	m_dwMinimalVolume;
	DWORD	m_dwMaximalVolume;
	DWORD	m_dwVolumeStep;

	// User Info
	DWORD					m_dwUserValue;

typedef	CVolumeOutWave*	PCVolumeOutWave;

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Alex Chmut
Web Developer
Ukraine Ukraine
No Biography provided

You may also be interested in...

Permalink | Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.171114.1 | Last Updated 17 Nov 1999
Article Copyright 1999 by Alex Chmut
Everything else Copyright © CodeProject, 1999-2017
Layout: fixed | fluid