Platform SDK: TAPI |
The TSPI_lineUnhold function retrieves the specified held call.
LONG TSPIAPI TSPI_lineUnhold( DRV_REQUESTID dwRequestID, HDRVCALL hdCall );
Returns dwRequestID, or an error number if an error occurs. The lResult actual parameter of the corresponding ASYNC_COMPLETION is zero if the function succeeds, or an error number if an error occurs. Possible return values are as follows:
LINEERR_INVALCALLHANDLE, LINEERR_OPERATIONUNAVAIL, LINEERR_INVALCALLSTATE, LINEERR_OPERATIONFAILED, LINEERR_NOMEM, LINEERR_RESOURCEUNAVAIL.
The service provider returns LINEERR_INVALCALLSTATE if the call is not currently on hold.
This operation works for calls on hard hold (calls placed on hold using TSPI_lineHold) and on soft hold. The service provider should check that the call is currently in the onHold, onHoldPendingTransfer, or onHoldPendingConference state, change the state to connected, and send a LINECALLSTATE message for the new call state.
Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
Windows 95/98: Requires Windows 95 or later.
Version: Requires TAPI 1.3 or later.
Header: Declared in Tspi.h.