lineGetCallStatus function (tapi.h)
The lineGetCallStatus function returns the current status of the specified call.
LONG lineGetCallStatus( HCALL hCall, LPLINECALLSTATUS lpCallStatus );
Handle to the call to be queried. The call state of hCall can be any state.
Pointer to a variably sized data structure of type LINECALLSTATUS. Upon successful completion of the request, this structure is filled with call status information. Prior to calling lineGetCallStatus, the application must set the dwTotalSize member of this structure to indicate the amount of memory available to TAPI for returning information.
Returns zero if the request succeeds or a negative error number if an error occurs. Possible return values are:
LINEERR_INVALCALLHANDLE, LINEERR_RESOURCEUNAVAIL, LINEERR_INVALPOINTER, LINEERR_STRUCTURETOOSMALL, LINEERR_NOMEM, LINEERR_UNINITIALIZED, LINEERR_OPERATIONFAILED, LINEERR_OPERATIONUNAVAIL.
The lineGetCallStatus function returns the dynamic status of a call, whereas lineGetCallInfo returns primarily static information about a call. Call status information includes the current call state, detailed mode information related to the call while in this state (if any), as well as a list of the available API functions the application can invoke on the call while the call is in this state. An application would typically be interested in requesting this information when it receives notification about a call state change by the LINE_CALLSTATE message.