FaxEnumPortsW function (winfax.h)
The FaxEnumPorts function enumerates all fax devices currently attached to the fax server to which the client has connected. The function returns detailed information for each fax port to the fax client application.
Syntax
WINFAXAPI BOOL FaxEnumPortsW(
[in] HANDLE FaxHandle,
[out] PFAX_PORT_INFOW *PortInfo,
[out] LPDWORD PortsReturned
);
Parameters
[in] FaxHandle
Type: HANDLE
Specifies a fax server handle returned by a call to the FaxConnectFaxServer function.
[out] PortInfo
Type: PFAX_PORT_INFO*
Pointer to the address of a buffer to receive an array of FAX_PORT_INFO structures. Each structure describes one fax port. The data includes, among other items, the permanent line identifier, and the current status and capability of the port. For information about memory allocation, see the following Remarks section.
[out] PortsReturned
Type: LPDWORD
Pointer to a DWORD variable to receive the number of FAX_PORT_INFO structures the function returns in the PortInfo parameter.
Return value
Type: BOOL
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError. GetLastError can return one of the following errors.
| Return code | Description |
|---|---|
|
Access is denied. FAX_JOB_QUERY access is required. |
|
One or all of the PortsReturned, PortInfo, or FaxHandle parameters are NULL. |
|
An error occurred during memory allocation. |
Remarks
The FaxEnumPorts function returns a list of fax jobs on the fax server of interest, as well as information available about each job. A fax administration application typically calls this function to display the fax job queue for administrative or query purposes. For more information, see Managing Fax Jobs.
The FaxEnumPorts function allocates the memory required for the FAX_JOB_ENTRY buffer array pointed to by the JobEntry parameter. An application must call the FaxFreeBuffer function to deallocate the resources associated with this parameter. For more information, see Freeing Fax Resources.
Note
The winfax.h header defines FaxEnumPorts as an alias that 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 is 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 |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | winfax.h |
| Library | WinFax.lib |
See also
Fax Service Client API Functions