modem speakerphone commands

[Erhan Ince <ince@eenet.ee.emu.edu.tr>]

Hi all,

I have a 56K US robotics speakerphone modem.

I am interested in activating the speakerphone or toggling  it off using

the modem commands from my visual basic program. I know how to
use the MSCOMM port I just don't know how to activate/de-activate
the speakerphone.

Reason I want to do this is for making the called party listed to a
sound
file played at the callers computer.

Any help will be most appreciated.

Regards to all ,
Erhan Ince