Three Way
Call hook-flash demo --- Click here
to download the sample code for VB6
This sample demonstrates how to involves using flash("hook-flash")
to do a three way conference call. Many devices such as
modems support only one line, and some only one call per
line, yet services from the central office (CO) or a PBX
allow you to still control multiple calls by sending special
characters such as the "flash", usually represented
by the exclamation point ("!").
Note: If you have a device that supports more than one call
per line, such as the Way2Call Hi-Phone, Dialogic card, etc.,
please use our conference and transfer samples for better
call control.
Requirement:
- Voice modem, voice board or other telephony devices.
- Phone line with 3-way calling
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Telephony
Programming Controls 
