Justok,

The PC/BIOS has to support power management and have a "soft" power switch for the machine to actually turn off.

>I ve read the Knowledge Base Section on Win32API,
>
>Then, I try to use ExitWindowsEx(66, 0) to off the computer!
>but neither VB4 nor VFP5 still reboot the PC !
>
>Of cos, ExitWindowsEx(67, 0) is successful on Reboot!!