Reason

The possible reasons for an incoming session, such as that it was transferred, are listed in the LINECALLREASON_ Constants.

Not all service providers support use of this information.

**TAPI 2.x:  **lineGetCallInfo (dwReason member of lpCallInfo)

**TAPI 3.x:  **ITCallInfo::get_CallInfoLong (CIL_REASON member of CALLINFO_LONG)