OpenEuphoria

Any ideas for a program whitelist program, ie I set something running, in the background, then go clicking on various menu entries or directly on executables in Windows Explorer. It would let say C:\Windows\notepad.exe run fine, but pop up an error on say C:\windows\regedit.exe. I'd want to configure the list on a per-user basis, but that's not the hard part. Anything open source would do, including C, but of course a pure Eu solution (maybe with a dash of assembly) would be neat.