Win32 API call from C# - ExitWindowsEx

[Jeremy Horton]

Hi,

New to C# and trying to build an app that has a logout button.
I just want the user to be able to log out of their Windows session from
within the Windows Form.
I have;

[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern bool ExitWindowsEx(string teststring1, int testint1);
// private static extern bool ExitWindows(int testint1, int testint2);
// error: entry point not found in user32.dll (?)

and then when the button is clicked;

public void Logout_Click(object sender, System.EventArgs e)
{
ExitWindowsEx(@"EWX_LOGOFF", 0);
// ExitWindows(0, 0);
// error: entry point not found in user32.dll (?)
}
With ExitWindows the entry point is not found, but with ExitWindowsEx
nothing happens (?)
I also see the memory of the .exe increasing by 4k everytime I press the
logout button,
any help greatly appreciated.
Jeremy.

 

[Shiva]

Hi,

The 1st parameter of ExitWindowsEx should be an uint, not string and pass 0
(for log off) for the 1st one.

Hi,

New to C# and trying to build an app that has a logout button.
I just want the user to be able to log out of their Windows session from
within the Windows Form.
I have;

[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern bool ExitWindowsEx(string teststring1, int testint1);
// private static extern bool ExitWindows(int testint1, int testint2);
// error: entry point not found in user32.dll (?)

and then when the button is clicked;

public void Logout_Click(object sender, System.EventArgs e)
{
ExitWindowsEx(@"EWX_LOGOFF", 0);
// ExitWindows(0, 0);
// error: entry point not found in user32.dll (?)
}
With ExitWindows the entry point is not found, but with ExitWindowsEx
nothing happens (?)
I also see the memory of the .exe increasing by 4k everytime I press the
logout button,
any help greatly appreciated.
Jeremy.

 

[Adam Clauss]

Just as a follow up - you should also check out
http://www.pinvoke.net/

Search there for ExitWindowsEx. There is description and sample of how to use it there.

 

[Jeremy]

Shiva - worked first go.
Adam - pinvoke.net, if only I had know this site existed 12hrs ago !!

thanks.