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ExitWindowsEx shuts down or reboots the user's computer. Of course, since the shutdown/reboot process will begin once the function is called, there won't normally be much left for your program to do. The function returns 0 if an error occured, or 1 if successful. uFlags One or more of the following flags specifying how to shut down or reboot the computer: EWX_FORCE = 4 Force any applications to quit instead of prompting the user to close them. EWX_LOGOFF = 0 Log off the network. EWX_POWEROFF = 8 Shut down the system and, if possible, turn the computer off. EWX_REBOOT = 2 Perform a full reboot of the system. EWX_SHUTDOWN = 1 Shut down the system. dwReserved Reserved for future versions of Windows. Always set to 0. See: http://www.pietschsoft.com/programming/vbapi/ref/funca.html#e