I'm going to go out on a limb here and say you can't do it directly from ASP. There is no ASP object that will do this and the probable way of doing it is throught the WinAPI. Since you cannot access WinAPI directly from ASP, that would no be an option. I don't know of any existing COM dll's that will this either unless you found something third party.
I would think you have to create a dll in VB (or any other COM aurthoring language) to do it and call that DLL.
If anyone can prove otherwise, please speak up.
Chris.