How do I lock a windows workstation programmatically? [duplicate]

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Closed 9 years ago.

Possible Duplicate:
Lock Windows workstation programmatically in C#

I am currently working on a visual studio windows form application that requires a function that locks the workstation. How can i make use of user32.dll to do a lock (Windows + L) when the function is called?

Answer 1

I haven't tried it myself, but I found this on google

Process.Start(@"C:\WINDOWS\system32\rundll32.exe", "user32.dll,LockWorkStation");

edit: I tried it, and it works!

edit2: Here's a solution using user32.dll that doesn't start an external process.

using System.Runtime.InteropServices;

declare a method like this:

[DllImport("user32.dll")]
public static extern bool LockWorkStation();

and then call LockWorkStation();.

Voilà

Answer 2

using System.Runtime.InteropServices;


[DllImport("user32.dll")]
public static extern int ExitWindowsEx(int uFlags, int dwReserved);

just call

 ExitWindowsEx(0, 0);