Obtaining Call State Information

Using the function lineGetCallStatus, an application can receive complete call status information for the specified call as a data structure of type LINECALLSTATUS. The function lineGetCallInfo returns mostly constant information about a call as a data structure of the type LINECALLINFO. The message LINE_CALLSTATE is sent unsolicited to an application to notify it about changes in a call's state.

The call-information data structure maintained for each call contains an application-specific field that applications can read from and write to. This field is not interpreted by TAPI. Applications can use it to tag calls in application-specific ways. Writing to this field so that the change is visible to other applications can be done with the function lineSetAppSpecific.

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