Slightly off-topic I know, but I can't help but question the motives behind some of the questions that get asked here. A couple of current threads such as how to load another program before the operating system, how to assume control of all system message boxes, how to format hard drives programatically seem to me that they could be used for nefarious purposes and although I supposed it's possible, aren't likely to be used in legitimate programs. I'd suggest trying to determine what the person has in mind before supplying information in these cases.