[MSDN Library June 1998] TAPI Version 1.4 (38.9012757377176%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > Using the TAPI 2.1 Programmer's Reference > TAPI Versions

[MSDN Library June 1998] TAPI Version 1.5 (38.9012757377176%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > Using the TAPI 2.1 Programmer's Reference > TAPI Versions

[MSDN Library June 1998] TAPI Version 2.1 (38.9012757377176%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > Using the TAPI 2.1 Programmer's Reference > TAPI Versions

[MSDN Library June 1998] TAPI Version 2.0 (38.9012757377176%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > Using the TAPI 2.1 Programmer's Reference > TAPI Versions

[MSDN Library June 1998] TAPI Version 1.3 (38.9012757377176%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > Using the TAPI 2.1 Programmer's Reference > TAPI Versions