lineGetAgentStatusA function (tapi.h)
The lineGetAgentStatus function obtains the agent-related status on the specified address.
Syntax
LONG lineGetAgentStatusA(
HLINE hLine,
DWORD dwAddressID,
LPLINEAGENTSTATUS lpAgentStatus
);
Parameters
hLine
Handle to the open line device.
dwAddressID
Address on the open line device whose agent status is to be queried. An address identifier is permanently associated with an address; the identifier remains constant across operating system upgrades.
lpAgentStatus
Pointer to a variably sized structure of type LINEAGENTSTATUS. Upon successful completion of the request, this structure is filled with agent status information. Prior to calling lineGetAgentStatus, the application must set the dwTotalSize member of this structure to indicate the amount of memory available to TAPI for returning information.
Return value
Returns a positive request identifier if the asynchronous operation starts; otherwise, one of these negative error values:
LINEERR_INVALADDRESSID, LINEERR_INVALLINEHANDLE, LINEERR_INVALPOINTER, LINEERR_NOMEM, LINEERR_OPERATIONFAILED, LINEERR_OPERATIONUNAVAIL, LINEERR_RESOURCEUNAVAIL, LINEERR_STRUCTURETOOSMALL, LINEERR_UNINITIALIZED.
Remarks
Note
The tapi.h header defines lineGetAgentStatus as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | tapi.h |
| Library | Tapi32.lib |
| DLL | Tapi32.dll |