Ist es irgendwie möglich z.B. mit SendMessage die Systemlautstärke zu ändern?
Wäre toll! Brauche einfach die Funktionen Vol+, Vol- und Mute...

Merci

Hoffentlich gibts das... Ist wirklich wichtig!
(Arbeite mit BCB6)

Mfg Ominion

Aus "Program 2" von dem CodeProject Link:

BOOL CVolumeDlg::amdInitialize()
{
	ASSERT(m_hMixer == NULL);

	// get the number of mixer devices present in the system
	m_nNumMixers = ::mixerGetNumDevs();

	m_hMixer = NULL;
	::ZeroMemory(&m_mxcaps, sizeof(MIXERCAPS));

	m_strDstLineName.Empty();
	m_strVolumeControlName.Empty();
	m_dwMinimum = 0;
	m_dwMaximum = 0;
	m_dwVolumeControlID = 0;

	// open the first mixer
	// A "mapper" for audio mixer devices does not currently exist.
	if (m_nNumMixers != 0)
	{
		if (::mixerOpen(&m_hMixer,
						0,
						reinterpret_cast<DWORD>(this->GetSafeHwnd()),
						NULL,
						MIXER_OBJECTF_MIXER | CALLBACK_WINDOW)
			!= MMSYSERR_NOERROR)
		{
			return FALSE;
		}

		if (::mixerGetDevCaps(reinterpret_cast<UINT>(m_hMixer),
							  &m_mxcaps, sizeof(MIXERCAPS))
			!= MMSYSERR_NOERROR)
		{
			return FALSE;
		}
	}

	return TRUE;
}

BOOL CVolumeDlg::amdUninitialize()
{
	BOOL bSucc = TRUE;

	if (m_hMixer != NULL)
	{
		bSucc = (::mixerClose(m_hMixer) == MMSYSERR_NOERROR);
		m_hMixer = NULL;
	}

	return bSucc;
}

BOOL CVolumeDlg::amdGetMasterVolumeControl()
{
	if (m_hMixer == NULL)
	{
		return FALSE;
	}

	// get dwLineID
	MIXERLINE mxl;
	mxl.cbStruct = sizeof(MIXERLINE);
	mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
	if (::mixerGetLineInfo(reinterpret_cast<HMIXEROBJ>(m_hMixer),
						   &mxl,
						   MIXER_OBJECTF_HMIXER |
						   MIXER_GETLINEINFOF_COMPONENTTYPE)
		!= MMSYSERR_NOERROR)
	{
		return FALSE;
	}

	// get dwControlID
	MIXERCONTROL mxc;
	MIXERLINECONTROLS mxlc;
	mxlc.cbStruct = sizeof(MIXERLINECONTROLS);
	mxlc.dwLineID = mxl.dwLineID;
	mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_VOLUME;
	mxlc.cControls = 1;
	mxlc.cbmxctrl = sizeof(MIXERCONTROL);
	mxlc.pamxctrl = &mxc;
	if (::mixerGetLineControls(reinterpret_cast<HMIXEROBJ>(m_hMixer),
							   &mxlc,
							   MIXER_OBJECTF_HMIXER |
							   MIXER_GETLINECONTROLSF_ONEBYTYPE)
		!= MMSYSERR_NOERROR)
	{
		return FALSE;
	}

	// store dwControlID
	m_strDstLineName = mxl.szName;
	m_strVolumeControlName = mxc.szName;
	m_dwMinimum = mxc.Bounds.dwMinimum;
	m_dwMaximum = mxc.Bounds.dwMaximum;
	m_dwVolumeControlID = mxc.dwControlID;

	return TRUE;
}

BOOL CVolumeDlg::amdGetMasterVolumeValue(DWORD &dwVal) const
{
	if (m_hMixer == NULL)
	{
		return FALSE;
	}

	MIXERCONTROLDETAILS_UNSIGNED mxcdVolume;
	MIXERCONTROLDETAILS mxcd;
	mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
	mxcd.dwControlID = m_dwVolumeControlID;
	mxcd.cChannels = 1;
	mxcd.cMultipleItems = 0;
	mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
	mxcd.paDetails = &mxcdVolume;
	if (::mixerGetControlDetails(reinterpret_cast<HMIXEROBJ>(m_hMixer),
								 &mxcd,
								 MIXER_OBJECTF_HMIXER |
								 MIXER_GETCONTROLDETAILSF_VALUE)
		!= MMSYSERR_NOERROR)
	{
		return FALSE;
	}

	dwVal = mxcdVolume.dwValue;

	return TRUE;
}

BOOL CVolumeDlg::amdSetMasterVolumeValue(DWORD dwVal) const
{
	if (m_hMixer == NULL)
	{
		return FALSE;
	}

	MIXERCONTROLDETAILS_UNSIGNED mxcdVolume = { dwVal };
	MIXERCONTROLDETAILS mxcd;
	mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
	mxcd.dwControlID = m_dwVolumeControlID;
	mxcd.cChannels = 1;
	mxcd.cMultipleItems = 0;
	mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
	mxcd.paDetails = &mxcdVolume;
	if (::mixerSetControlDetails(reinterpret_cast<HMIXEROBJ>(m_hMixer),
								 &mxcd,
								 MIXER_OBJECTF_HMIXER |
								 MIXER_SETCONTROLDETAILSF_VALUE)
		!= MMSYSERR_NOERROR)
	{
		return FALSE;
	}

	return TRUE;
}

Was ist daran unverständlich?

Danke trotzdem für die Hilfe. Hat sich erledigt. Werde die Funktion nicht einsetzen, da sie zu schwierig ist...

Tja. Merci