User Interface Notifications and Display
If the user interface for the feature shows the state of the firewall rules, it should use the INetFwPolicy2::get_IsRuleGroupCurrentlyEnabled method, which provides a Boolean response regardless of whether the firewall rule group is enabled locally or by a domain administrator through Group Policy.
It may be prudent to check whether modifying the local policy will have any impact on the resultant policy. The firewall "shields-up" feature or the domain administrator may be disallowing local policy exceptions, in which case any API calls would be fruitless. The INetFwPolicy2::get_LocalPolicyModifyState method indicates whether local policy changes will take effect. If they do not, the API provides a return code to indicate why the changes will not take effect. This provides application developers with sufficient information to assist the user with correcting the problem.
Build date: 10/26/2012