LINE_CALLINFO
The
LINE_CALLINFO message is sent when the call information about the specified
call has changed. The application can invoke lineGetCallInfo to determine the current
call information.
LINE_CALLINFO
dwDevice = (DWORD) hCall;
dwCallbackInstance = (DWORD) hCallback;
dwParam1 =
(DWORD) CallInfoState;
dwParam2 =
(DWORD) 0;
dwParam3 =
(DWORD) 0;
Parameters
dwDevice
A handle to
the call.
dwCallbackInstance
The callback
instance supplied when opening the call's line.
dwParam1
The call
information item that has changed. Can be a combination of these values:
LINECALLINFOSTATE_OTHER
Information
items other than those listed below have changed. The application should check
the current call information to determine which items have changed.
LINECALLINFOSTATE_DEVSPECIFIC
The
device-specific field of the call-information record has changed.
LINECALLINFOSTATE_BEARERMODE
The bearer
mode field of the call-information record has changed.
LINECALLINFOSTATE_RATE
The rate
field of the call-information record has changed.
LINECALLINFOSTATE_MEDIAMODE
The media
mode field of the call-information record has changed.
LINECALLINFOSTATE_APPSPECIFIC
The
application-specific field of the call-information record has changed.
LINECALLINFOSTATE_CALLID
The call ID
field of the call-information record has changed.
LINECALLINFOSTATE_RELATEDCALLID
The related
call ID field of the call-information record has changed.
LINECALLINFOSTATE_ORIGIN
The origin
field of the call-information record has changed.
LINECALLINFOSTATE_REASON
The reason
field of the call-information record has changed.
LINECALLINFOSTATE_COMPLETIONID
The
completion ID field of the call-information record has changed.
LINECALLINFOSTATE_NUMOWNERINCR
The number of
owner fields in the call-information record was increased.
LINECALLINFOSTATE_NUMOWNERDECR
The number of
owner fields in the call-information record was decreased.
LINECALLINFOSTATE_NUMMONITORS
The number of
monitors fields in the call-information record has changed.
LINECALLINFOSTATE_TRUNK
The trunk
field of the call information record has changed.
LINECALLINFOSTATE_CALLERID
One of the
callerID-related fields of the call information record has changed.
LINECALLINFOSTATE_CALLEDID
One of the
calledID-related fields of the call information record has changed.
LINECALLINFOSTATE_CONNECTEDID
One of the
connectedID-related fields of the call information record has changed.
LINECALLINFOSTATE_REDIRECTIONID
One of the
redirectionID-related fields of the call information record has changed.
LINECALLINFOSTATE_REDIRECTINGID
One of the
redirectingID-related fields of the call information record has changed.
LINECALLINFOSTATE_DISPLAY
The display
field of the call information record has changed.
LINECALLINFOSTATE_USERUSERINFO
The
user-to-user information of the call information record has changed.
LINECALLINFOSTATE_HIGHLEVELCOMP
The
high-level compatibility field of the call information record has changed.
LINECALLINFOSTATE_LOWLEVELCOMP
The low-level
compatibility field of the call information record has changed.
LINECALLINFOSTATE_CHARGINGINFO
The charging
information of the call information record has changed.
LINECALLINFOSTATE_TERMINAL
The terminal
mode information of the call information record has changed.
LINECALLINFOSTATE_DIALPARAMS
The dial
parameters of the call information record has changed.
LINECALLINFOSTATE_MONITORMODES
One or more
of the digit, tone, or media monitoring fields in the call information record
has changed.
dwParam2
Unused.
dwParam3
Unused.
Return Values
No return
value.
Remarks
A
LINE_CALLINFO message with a NumOwnersIncr, NumOwnersDecr, and/or
NumMonitorsChanged indication is sent to applications that already have
a handle for the call. This can be the result of another application changing
ownership or monitorship to a call with lineOpen, lineClose, lineShutdown, lineSetCallPrivilege, lineGetNewCalls, and lineGetConfRelatedCalls.
These
LINE_CALLINFO messages are not sent when a notification of a new call is provided
in a LINE_CALLSTATE
message, because the call information already reflects the correct number of
owners and monitors at the time the LINE_CALLSTATE messages are sent.
LINE_CALLINFO messages are also suppressed in the case where a call is offered by
TAPI to monitors through the LINECALLSTATE_UNKNOWN mechanism.
Note The application
which causes a change in the number of owners or monitors (for example, by
invoking lineDeallocateCall or lineSetCallPrivilege) will not
itself receive a message indicating that the change has been done.
No
LINE_CALLINFO messages are sent for a call after the call has entered the idle
state. Specifically, changes in the number of owners and monitors are not
reported as applications deallocate their handles for the idle call.
See Also