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The FwpmSystemPortsSubscribe0 function is used to request the delivery of notifications regarding a particular system port.
Syntax
DWORD FwpmSystemPortsSubscribe0(
[in, optional] HANDLE engineHandle,
void *reserved,
[in] FWPM_SYSTEM_PORTS_CALLBACK0 callback,
[in, optional] void *context,
[out] HANDLE *sysPortsHandle
);
Parameters
[in, optional] engineHandle
Type: HANDLE
Handle for an open session to the filter engine. Call FwpmEngineOpen0 to open a session to the filter engine.
reserved
Type: void*
Reserved.
[in] callback
Type: FWPM_SYSTEM_PORTS_CALLBACK0
Function pointer that will be invoked when a notification is ready for delivery.
[in, optional] context
Type: void*
Optional context pointer. This pointer is passed to the callback function along with details of the system port.
[out] sysPortsHandle
Type: HANDLE*
Handle to the newly created subscription.
Return value
Type: DWORD
| Return code/value | Description |
|---|---|
|
The subscription was created successfully. |
|
A Windows Filtering Platform (WFP) specific error. See WFP Error Codes for details. |
|
Failure to communicate with the remote or local firewall engine. |
Remarks
This function cannot be called from within a transaction. It will fail with FWP_E_TXN_IN_PROGRESS. See Object Management for more information about transactions.
FwpmSystemPortsSubscribe0 is a specific implementation of FwpmSystemPortsSubscribe. See WFP Version-Independent Names and Targeting Specific Versions of Windows for more information.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps only] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | fwpmu.h |
| Library | Fwpuclnt.lib |
| DLL | Fwpuclnt.dll |