Thanx Sergey. The example is a little bit cryptic. I hope to get rid of it, but it's what I really needed.

>>I need to change the logname (and password) by program. So, 'mister_x' will launch the VFP program, 'mister_y' will use and modify data, and 'mister_x' will exit the program. Is it possible to do that? Windows XP support this change on the fly
>
>Check Re: Anybody using RUNAS utility Thread #948554