rc = mixerOpen(&hMixer, (UINT)m_currentOb->waveIn.m_hWaveIn,0,0,MIXER_OBJECTF_HWAVEIN);
			if (MMSYSERR_NOERROR != rc) {
				return;
			}

			ZeroMemory(&mxl,sizeof(mxl));
			mxl.cbStruct = sizeof(mxl);

			//mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN;

			rc = mixerGetLineInfo((HMIXEROBJ)m_currentOb->waveIn.m_hWaveIn, &mxl,
                           MIXER_OBJECTF_HWAVEIN);

			if(rc != MMSYSERR_NOERROR)
				return;

			ZeroMemory(&mxlc, sizeof(mxlc));
			mxlc.cbStruct = sizeof(mxlc);
			mxlc.dwLineID = mxl.dwLineID;
			mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_PEAKMETER;
			mxlc.cControls = 1;
			mxlc.cbmxctrl = sizeof(mxc);
			mxlc.pamxctrl = &mxc;
			ZeroMemory(&mxc, sizeof(mxc));
			mxc.cbStruct = sizeof(mxc);
			//MIXER_GETLINECONTROLSF_ONEBYTYPE
			rc = mixerGetLineControls((HMIXEROBJ)m_currentOb->waveIn.m_hWaveIn,&mxlc,
									   MIXER_OBJECTF_HWAVEIN);

			if(rc != MMSYSERR_NOERROR)
				return;

			MIXERCONTROLDETAILS mxcd;             // Gets the control values.
			MIXERCONTROLDETAILS_SIGNED volStruct; // Gets the control values.
			long volume;                          // Holds the final volume value.

			// Initialize the MIXERCONTROLDETAILS structure
			ZeroMemory(&mxcd, sizeof(mxcd));
			mxcd.cbStruct = sizeof(mxcd);
			mxcd.cbDetails = sizeof(volStruct);
			mxcd.dwControlID = mxc.dwControlID;
			mxcd.paDetails = &volStruct;
			mxcd.cChannels = 1;

			// Get the current value of the peakmeter control. Typically, you
			// would set a timer in your program to query the volume every 10th
			// of a second or so.

			//MIXER_GETCONTROLDETAILSF_VALUE
			rc = mixerGetControlDetails((HMIXEROBJ)m_currentOb->waveIn.m_hWaveIn, &mxcd,
									 MIXER_OBJECTF_HWAVEIN);
		/*	rc = mixerGetControlDetails((HMIXEROBJ)hMixer, &mxcd,
										 MIXER_GETCONTROLDETAILSF_VALUE);*/

			if (MMSYSERR_NOERROR != rc) {
				return;
			}
			volume = volStruct.lValue;

			// Get the absolute value of the volume.
			if (volume < 0)
				volume = -volume;

			m_ctrlPeakMeter.SetMeterBands(1, mxc.Bounds.lMaximum);
			int iArray[1];
			iArray[0] = volume;
			m_ctrlPeakMeter.SetData(iArray, 0, 1);

			mixerClose(hMixer);

Danke

Kevin

Kevin