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lineGetCallStatus function (tapi.h)

  • Article

The lineGetCallStatus function returns the current status of the specified call.

Syntax

LONG lineGetCallStatus(
  HCALL            hCall,
  LPLINECALLSTATUS lpCallStatus
);

Parameters

hCall

Handle to the call to be queried. The call state of hCall can be any state.

lpCallStatus

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.

Note  If the size parameters in the structure are not correct, there is a possibility that data could get overwritten. For more information on setting structure sizes, see the memory allocation topic.
 

Return value

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.

Remarks

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.

Requirements

Requirement Value
Target Platform Windows
Header tapi.h
Library Tapi32.lib
DLL Tapi32.dll

See also

Basic Telephony Services Reference

LINECALLSTATUS

LINE_CALLSTATE

TAPI 2.2 Reference Overview

lineGetCallInfo