The FwpmCalloutUnsubscribeChanges0 function is used to cancel a callout change subscription and stop receiving change notifications.
DWORD FwpmCalloutUnsubscribeChanges0( HANDLE engineHandle, HANDLE changeHandle );
Handle for an open session to the filter engine. Call FwpmEngineOpen0 to open a session to the filter engine.
Handle of the subscribed change notification. This is the handle returned by the call to FwpmCalloutSubscribeChanges0.
||The subscription was deleted successfully.|
||A Windows Filtering Platform (WFP) specific error. See WFP Error Codes for details.|
||Failure to communicate with the remote or local firewall engine.|
If the callback is currently being invoked, this function will not return until the callback completes. Thus, when calling this function, you must not hold any locks that the callback may also try to acquire lest you deadlock.
It is not necessary to unsubscribe before closing a session; all subscriptions are automatically canceled when the subscribing session terminates.
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.
FwpmCalloutUnsubscribeChanges0 is a specific implementation of FwpmCalloutUnsubscribeChanges. See WFP Version-Independent Names and Targeting Specific Versions of Windows for more information.
|Minimum supported client||Windows Vista [desktop apps only]|
|Minimum supported server||Windows Server 2008 [desktop apps only]|