VB.NET Shutdown fails to execute in WindowsXP

Hello, I have reviewd many of the threads here on how to shutdown a system and created this code using the VB.NET cookbooks solution.

VB Code:

Public Class Form1
    Inherits System.Windows.Forms.Form
 
    Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long
 
 
    Private Enum windowsexitflags
        logoff = 0
        Shutdown = 1
    End Enum
    Private Sub btnShutdown_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnShutdown.Click
        MessageBox.Show("Test before")'to see if im going through the button press
        ExitWindowsEx(windowsexitflags.Shutdown, 1&)
        MessageBox.Show(" Test after")
    End Sub
    Private Sub btnNo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNo.Click
        ExitWindowsEx(windowsexitflags.logoff, 0&)
    End Sub
    Private Sub btnYes_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnYes.Click
        Me.Close()
    End Sub
End Class

MY Problem is LOGOFF works, SHUTDOWN does not... I do not understand why. Console app is being run on a windows XP SP2 box under administrative privilges. Any sugestions would be appreciated.

it has to do with rights for the code to be allowed to shutdown windows..

here is a VB6 article, but the same idea applies in .NET as well..

http://blogs.msdn.com/brad_mccabe/ar...02/383542.aspx

try this:

VB Code:

Process.Start("Shutdown -s -t 05")

here is an artical from vbnet
Sufficient Rights to shut down windows