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lineSwapHold

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This function swaps the specified active call with the specified call on consultation hold.

LONG WINAPI lineSwapHold(
  HCALL hActiveCall,
  HCALL hHeldCall 
);

Parameters

  • hActiveCall
    Handle to the active call. The application must be an owner of the call. The call state of hActiveCall must be connected.
  • hHeldCall
    Handle to the consultation call. The application must be an owner of the call. The call state of hHeldCall can be onHoldPendingTransfer, onHoldPendingConference, or onHold.

Return Values

Returns a positive request identifier if the function is completed asynchronously, or a negative error number if an error occurs. The dwParam2 parameter of the corresponding LINE_REPLY message is zero if the function succeeds or it is a negative error number if an error occurs. The following table shows the return values for this function.

Value Description
LINEERR_INVALCALLHANDLE A call handle is invalid.
LINEERR_OPERATIONUNAVAIL The operation is unavailable.
LINEERR_INVALCALLSTATE The call state is invalid.
LINEERR_OPERATIONFAILED The operation failed.
LINEERR_NOMEM Not enough memory is available.
LINEERR_RESOURCEUNAVAIL The resources are unavailable.
LINEERR_NOTOWNER The application is not an owner of this call.
LINEERR_UNINITIALIZED A parameter is uninitialized.

Remarks

Swapping the active call with the call on consultation hold allows the application to alternate or toggle between these two calls. This is typical in call waiting.

Note   This function is for TAPI version 2.0 and later.

Requirements

OS Versions: Windows CE 1.0 and later.
Header: Tapi.h.
Link Library: Coredll.lib.

See Also

LINE_REPLY

 Last updated on Saturday, April 10, 2004

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