Reading and changing the master volume on Vista/7

[Theo Gottwald]

I have expanded this sample code, trying to get the volume of avilable Audio Channel.

I have used:

Code Select Expand


LOCAL ch AS LONG, vol AS SINGLE

pIAudioEndpointVolume.SetChannelVolumeLevelScalar(ch,vol,BYVAL %NULL)

But it seems not to produce the expected Result.
Has anybody tried this before and knows whats wrong (why the volume doesn't change in the Mixer?)