CODEWITHSUNDEEP
vb.netshutdownlocked
Altycoder
Altycoder

Reputation: 270

How to shutdown a locked PC (vb.net)?

Shutting down a pc in vb.net is easy:

Process.Start("shutdown", "-s -t 00")

unless the user has locked the pc in which case the above fails.

How do I get around this in vb.net? How do I shutdown a locked PC?

The program will be running locally.

Upvotes: 3

Views: 3431

Answers (6)

Chaosis
Chaosis

Reputation: 21

System.Diagnostics.Process.Start("shutdown", "-s -f -t 00")

This will force a shutdown In 00ms silently. The code you have to invoke each process is redundant, use the code above. Just do a System.Imports.IO at the top and you are good to go.

Upvotes: 2

Altycoder
Altycoder

Reputation: 270

For posterity:

Dim ms As ManagementScope = New ManagementScope("\\LocalHost")
    ms.Options.EnablePrivileges = True

    Dim oq As ObjectQuery = New ObjectQuery("SELECT * FROM Win32_OperatingSystem")
    Dim query1 As ManagementObjectSearcher = New ManagementObjectSearcher(ms, oq)
    Dim queryCollection1 As ManagementObjectCollection = query1.Get()

    For Each mo As ManagementObject In queryCollection1
        Dim ss As String() = {"5"}
        mo.InvokeMethod("Win32Shutdown", ss)
    Next

Google "Win32Shutdown" for more details of the flags available (ss above). 5 is a forced shutdown for when the pc is locked but it's more graceful than shutdown /f and doesn't appear to cause any problems with programs or services on restart.

Upvotes: 1

Heinzi
Heinzi

Reputation: 172270

Using the System.Management namespace is more elegant than starting an external tool. Here is a code example in C#, which should be fairly easy to convert:

http://www.dreamincode.net/forums/topic/33948-how-to-shut-down-your-computer-in-c%23/

Upvotes: 0

Hans Olsson
Hans Olsson

Reputation: 55009

I think you're looking for the '-f' flag to force a shutdown.

Quote from a MS KB article: When the computer is locked, you can shut down the computer, if you run the Shutdown.exe command together with the -f option.

Upvotes: 1

Preet Sangha
Preet Sangha

Reputation: 65496

You could P/Invoke ExitWindowsEx

There is an example in C# there, but I'm sure you can convert it.

Upvotes: 1

t0mm13b
t0mm13b

Reputation: 34592

Have a look at this article on CodeProject which illustrates forcing a computer to shutdown remotely to give you an idea on how to do it.

Upvotes: 0

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