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lineGetNewCalls (Compact 2013)

  • 아티클

3/26/2014

This function returns call handles to calls on a specified line or address for which the application currently does not have handles. The application is granted monitor privilege to these calls.

Syntax

LONG WINAPI lineGetNewCalls(
  HLINE hLine,
  DWORD dwAddressID,
  DWORD dwSelect,
  LPLINECALLLIST lpCallList 
);

Parameters

  • hLine
    Handle to an open line device.
  • dwAddressID
    Address on the given open line device. An address identifier is permanently associated with an address; the identifier remains constant across operating system upgrades.
  • dwSelect
    Selection of calls that are requested. This parameter uses one and only one of the LINECALLSELECT constants.
  • lpCallList
    Pointer to a variably sized data structure of type LINECALLLIST. Upon successful completion of the request, call handles to all selected calls are returned in this structure. Prior to calling lineGetNewCalls, the application should set the dwTotalSize member of this structure to indicate the amount of memory available to TAPI for returning information.

Return Value

Returns zero if the request succeeds or a negative error number if an error occurs. The following table shows the return values for this function.

Value

Description

LINEERR_INVALADDRESSID

The address identifier is invalid.

LINEERR_OPERATIONFAILED

The operation failed.

LINEERR_INVALCALLSELECT

The selection of calls are invalid.

LINEERR_RESOURCEUNAVAIL

The resources are invalid.

LINEERR_INVALLINEHANDLE

The handle to the open line device is invalid.

LINEERR_STRUCTURETOOSMALL

The structure is too small.

LINEERR_INVALPOINTER

The pointer is invalid.

LINEERR_UNINITIALIZED

A parameter is uninitialized.

LINEERR_NOMEM

Not enough memory is available.

Remarks

An application can use lineGetNewCalls to obtain handles to calls for which it currently has no handles. The application can select the calls for which handles are to be returned by basing this selection on scope (calls on a specified line, or calls on a specified address). For example, an application can request call handles to all calls on a given address for which it currently has no handle. The application is always given monitor privilege to the new call handles. Also, when opening a line, an application uses this function to become aware of existing calls.

The application can invoke the lineGetCallInfo and lineGetCallStatus functions for each call in the list to determine the call's information and status, respectively. It can use the lineSetCallPrivilege function to change its privilege to owner.

Requirements

Header

tapi.h

Library

TAPI32.dll

See Also

Reference

TAPI Line Device Functions
lineGetCallInfo
lineGetCallStatus
lineSetCallPrivilege