regsvr32 and Vista

Testing the registration of one of our plugins (DLLs) under Vista fails when regsvr32 is launched returning error code 0×80070005.  This is an "Access Denied" error and has to do with the fact that under Vista, if you run regsvr32 from a command prompt, the command prompt must be started in Admin Mode (elevated).

What does regsvr32 do?

Programatically registering a dll.

Not only would executing a shell command to launch regsvr32 fail, but updating ther registery also gets a AccessDenied error.  I ended up just turning off UAC while I tested.  I suppose since our setup program accessed permission, once given, everything else worked.