[MSDN Library June 1998] TAPI Version 1.2 and Earlier (27.3739408457396%)

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 Quick Function Reference (26.7884852216749%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > TAPI Reference

[MSDN Library June 1998] TAPI Reference (26.40625%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1

[MSDN Library June 1998] TAPI Callback Function (26.3402653381102%)

MSDN Library Visual Studio 6.0 > Platform SDK > Windows Programming Guidelines > Windows CE Programmer's Guide > Core Services > Using Communications > Using a Modem

[MSDN Library June 1998] TAPI Version 1.4 (25.9453694171682%)

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