[MSDN Library June 1998] LINE_CALLSTATE (100%)

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 Line Device Messages

[MSDN Library June 1998] LINE_CALLSTATE (91.2912087912088%)

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 > Line Device Messages