NT User Emulation?

[MST3KGT]

I'm trying to find info on running a program under a specific user account. Basically, I'd like to lock down access to a directory, so only that acct and admin have access to it, then setting a VB app to open files in that directory using the pre-arranged account. Any ideas?

[terebi]

You can set the security attributes of a file in NT using API quite easily.
But when you are trying to get access to it and stuff...that requires a lot of token mucking about..And subsequently I would also like to know how it is actually hard-coded in vb.

[Zaphod]

Please I too would like to know how to implement NT security in Win 9x.