How do I, using eMbedded Visual C++, change the volume setting on a
Pocket PC (2002)? TAPI commands phoneSetHookSwitch and phoneSetVolume
do not return an error, but neither do they modify the volume (up or
down).
waveOutSetVolume does not work either. I need to control the volume
when receiving an incoming phone call. I'm using a Siemens SX56 phone
device.

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Clarification of Question by needinghelp-ga on 28 Feb 2003 09:06 PST

Summary: how do I capture and modify handset, headset, and/or speaker
volume with my own program. My original question is not specific to
incoming phone calls, although that's important to me.