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Programmatically lock a Windows PC


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How can I programmatically lock a PC? My situation is that I use VNC to access a remote machine, when I'm done, I want to lock that PC again. I used to have VNC send Control+Alt+Delete via its system menu and then I'd click on 'Lock Workstation'. With Windows XP this doesn't work anymore and VNC cannot send the new shortcut Windows-Key + L.


Put a shortcut to this command on your remote desktop:
rundll32.exe user32.dll, LockWorkStation

Another good tools is shutdown.exe provided by Microsoft since Windows 2000. Read the documentation here:


2006-03-30, 07:54:14
anonymous from Germany  
If you have access to the win vnc server configuration you can tell vnc do lock the workstation after disconnecting
2011-12-05, 07:19:06   (updated: 2011-12-05, 07:20:06)
anonymous from Singapore  
I don't understand how to Put a shortcut to command rundll32.exe user32.dll, LockWorkStation. It will help me a lot if you inform me.
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