Looking for code fragment to iterate over all existing Current_Users to delete keys

In the past, for one of our products all the keys were in CURRENT_USER, and initialized by the application. We have some corporate customers, who have custom preferences, and so we changed to the customary scheme of initializing keys for LOCAL_MACHINE, which can be overridden individually by users locating their keys in CURRENT_USER.

The problem is to upgrade thousands of existing users under this scenario, the updated installer will have to clear out existing CURRENT_USER keys with in some cases 30-30 users per machine.

Since I am short of time, I am looking for a code fragment that does that, since somebody has to have run into the same issue before.

:lol