[MSDN Library April 2000] PHONEBUTTONMODE_ Constants (94.4444444444444%)
MSDN Library - April 2000 > Platform SDK > Networking and Directory Services > Telephony Application Programming Interfaces (TAPI, TSPI, MSPI) > TAPI Version 2.2 (For C Applications) > TAPI 2.2 Reference > TAPI Constants > Phone Device Constants