|TAPIEx ActiveX Control v3.6
Property HeadSetVolume As Long
- Sets/returns the phone HeadSet earphone volume.
- The HeadSetVolume property specifies the earphone volume level of the HeadSet
phone device. This is a number in the range 0 (silence) to 65535 (maximum
volume). The actual granularity and quantization of gain settings in this
range are service provider-specific. A value that is out of range is set to
the nearest value in the range.
You should test the HeadSetCaps property to
discover if the phone device supports volume control.