[MSDN Library June 1998] PHONE_STATE (94.4444444444444%)

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

[MSDN Library June 1998] PHONE_STATE (86.3247863247863%)

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