Andrew,

when you feed a phone number to the phone dialer
through tapiRequestMakeCall it must be in canonical
or plain number format.

If you want to have prefixes dialed you should configure
these in the location settings (Phone and Modem Options).

Best regards,

Matthias Moetje
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TAPI WIKI: http://www.tapi.info
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TERASENS GmbH
Augustenstraße 24
80333 Munich, GERMANY
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e-mail: moetje at terasens dot com
www: www.terasens.com
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"Andrew" wrote in message
...
I wish to dial telephone numbers from an Excel VBA macro using my PC's
modem. A Google search came up with:
http://www.ozgrid.com/forum/showthread.php?t=16781
and
http://www.mrexcel.com/forum/showthread.php?t=70207
amongst others. Essentially they declare a function to access tapi32.dll:

Declare Function tapiRequestMakeCall Lib "TAPI32.DLL" (ByVal
lpszDestAddress As String, ByVal lpszAppName As String, ByVal
lpszCalledParty As String, ByVal lpszComment As String) As Long

And then use the function:

x = tapiRequestMakeCall(cPhone, "", cName, "")

where cPhone is a string containing the required number. e.g. "0123456789"

This works as expected. The Phone Dialer application pops up two windows
at the top left of the screen, once labelled "Preview" and the other
"Phone Call". However, I actually want to dial 'numbers' including the *
and # characters, for example, to cancel ringback on the BT network by
dialling "#37#" etc. If I enter a non-numeric number the second window
has the title "Internet Call" and the call fails with the message "Failed:
wrong number or the called device is out of service".

I can dial such numbers manually using Phone Dialer where I am able to
select whether I wish to dial as a Phone Call or as an Internet Call.

How can I dial # and * on the modem using TAPI32?