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waveOutGetVolume The waveOutGetVolume function retrieves the current volume level of the specified waveform-audio output device.
VB4-32,5,6
Declare Function waveOutGetVolume Lib "Winmm" (ByVal wDeviceID As Integer, dwVolume As Long) As Integer |
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Operating Systems Supported |
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Requires Windows NT 3.1 or later; Requires Windows 95 or later |
- hwo
Handle to an open waveform-audio output device. This parameter can also be a device identifier.
- pdwVolume
Pointer to a variable to be filled with the current volume setting. The low-order word of this location contains the left-channel volume setting, and the high-order word contains the right-channel setting. A value of 0xFFFF represents full volume, and a value of 0x0000 is silence.
If a device does not support both left and right volume control, the low-order word of the specified location contains the mono volume level.
The full 16-bit setting(s) set with the waveOutSetVolume function is returned, regardless of whether the device supports the full 16 bits of volume-level control. |
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following.
MMSYSERR_INVALHANDLE Specified device handle is invalid.
MMSYSERR_NODRIVER No device driver is present.
MMSYSERR_NOMEM Unable to allocate or lock memory.
MMSYSERR_NOTSUPPORTED Function isn't supported. |
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