A. There is no direct way to accomplish this, however it is possable to write a script and then call the shutdown.exe utility that is shipped with the NT Resource kit
shutdown /l /y
You could then add a shortcut to this script on the desktop. An alternative is to use a utility called ShutUp which can be downloaded from http://www.zdnet.com/pcmag/download/utils/shutup-a.htm .
You may also consider ShutdownPlus (http://www.wmsoftware.com/shutdownplus) which replaces the standard Windows shutdown and logoff dialog boxes. Shutdownplus allows you to run applications and stop services (stopping services only under NT/2000) at shutdown, restart, or logoff.
Another method is to use a special GINA from http://wwwthep.physik.uni-mainz.de/~frink/nt.html which enables you to do this.
In Windows 2000 this can be accomplished using Group Policy Objects. Go to the User Configuration - Windows Settings - Scripts (Logon/Logoff) and set the Logoff option.