When you use the Shut Down Windows dialog box, Windows 2000 stores the termination code for your last session in the Shutdown Setting value name, a REG_DWORD data type, at HKEY_Current_User\Software\Microsoft\Windows\CurrentVersion\Explorer:
Value D e s c r i p t i o n 0x1 Log off. 0x2 Shut down. 0x4 Restart. 0x10 Stand by. Maintains the session, keeping the computer running on low power with data still in memory. 0x20 Stand by, with wakeup events disabled. 0x40 Hibernate. 0x80 Disconnect (available only in Terminal Server sessions).NOTE: If you change the value in the registry, the Shut Down Windows dialog box will default to that setting, the next time you invoke it. If you enter a data value that is unsupported on your computer, Shut down ( 0x2) becomes the default. If you simply pull the plug, or run Shutdown.exe, the last termination code is NOT updated.