[MSDN Library April 2000] Functions and Messages (35.4111295681063%)
MSDN Library - April 2000 > Platform SDK > Networking and Directory Services > Telephony Application Programming Interfaces (TAPI, TSPI, MSPI) > TAPI Service Providers > Telephony Service Providers (TSP) > Telephony Service Provider Interface (TSPI) > Phone Devices > Extended Phone Services