How are you supposed to set the System Volume?

[Benjamin Bloomfield]

I would like to set the system volume to zero, so that it won't do system beeps and things while my application is recording audio, because they are extremely annoying when they get recorded as well.

Anyway, right now I am using the following line to try to do it, but it doesn't seem to be working properly (It causes the prefs screen to _show_ that System audio is off, but system audio sounds are still heard.)

PrefSetPreference(prefSysSoundLevelV20,sysSoundOff);

I also tried setting the "prefSysSoundVolume" preference, but the values that PrefGetPreference retrieved for it were inconsistent with how it was documented, and setting the PrefSysSoundLevelV20 preference seemed to alter the prefSysSoundVolume preference as well.

Anyway, someone _must_ be doing this, right?  How does the prefs app do it?

Thanks for any help?

-Benjamin Bloomfield
-- For information on using the PalmSource Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/