Question

I’ve been trying to adjust the example of uisng RegNotifyChangeKeyValue() given herefor my particular case — i.e. tracking changes done to a value within a registry key, but the event used in the example fires only once right after the app starts.

So I was wondering, can I track changes done to values of a Registry key like that?

Answer 1

Well, on that page from MSDN you mentioned, you can find that using REG_NOTIFY_CHANGE_LAST_SET as a filter does the following:

“Notify the caller of changes to a value of the key. This can include
adding or deleting a value, or changing an existing value.”

Further down it says:

This function detects a single change. After the caller receives a
notification event, it should call the function again to receive the
next notification.

You need to call RegNotifyChangeKeyValue in a loop in order to catch further changes.