how to determine windows update level through IUpdate interface

Question

I want to count available "important" windows updates in a c++ program. When windows updates reports about available updates, it classifies them by level. In vista the possible levels are {important, recommended, optional} XP : {high-priority, optional}

http://www.microsoft.com/windows/downloads/windowsupdate/updatelevels.mspx I can't find a mechanism to get the level of an update (IUpdate) from SDK.

Answer 1

It looks like the IUpdate::DownloadPriority property might be the correct mechanism for getting the level of importance of each update.

This property will return an value shown in the DownloadPriority enum . As mentioned in the documentation the the exact importance or difference between the priorities is up to the program that implements this interface; for example Vista defines each level as "important", "recommended" and "optional" whereas XP only implements "high-priority" and "optional", likely throwing the normal and low priority levels into the same bucket (would have to experiment to verify this).