auto shutdown winnt thru vb code

hi,

is there any way to shutdown winnt at a specified time from vb code.

please
help

thanks

bye.

VB Code:

Option Explicit
 
Private Const TOKEN_ADJUST_PRIVILEGES = &H20
Private Const TOKEN_QUERY = &H8
Private Const SE_PRIVILEGE_ENABLED = &H2
Private Const ANYSIZE_ARRAY = 1
 
Private Type LUID
    LowPart As Long
    HighPart As Long
End Type
Private Type LUID_AND_ATTRIBUTES
    pLuid As LUID
    Attributes As Long
End Type
Private Type TOKEN_PRIVILEGES
    PrivilegeCount As Long
    Privileges(ANYSIZE_ARRAY) As LUID_AND_ATTRIBUTES
End Type
 
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
Private Declare Function OpenProcessToken Lib "advapi32" (ByVal ProcessHandle As Long, ByVal DesiredAccess As Long, TokenHandle As Long) As Long
Private Declare Function LookupPrivilegeValue Lib "advapi32" Alias "LookupPrivilegeValueA" (ByVal lpSystemName As String, ByVal lpName As String, lpLuid As LUID) As Long
Private Declare Function AdjustTokenPrivileges Lib "advapi32" (ByVal TokenHandle As Long, ByVal DisableAllPrivileges As Long, NewState As TOKEN_PRIVILEGES, ByVal BufferLength As Long, PreviousState As TOKEN_PRIVILEGES, ReturnLength As Long) As Long
 
'my stuff to shut down windows.  needed to use NT's security
Private Enum SHUTDOWNFLAG
    EWX_LOGOFF = 0
    EWX_SHUTDOWN = 1
    EWX_REBOOT = 2
    EWX_FORCE = 4
    EWX_POWEROFF = 8
End Enum
Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As SHUTDOWNFLAG, ByVal dwReserved As Long) As Long
 
Private Sub EnableShutDown()
    Dim hProc As Long
    Dim hToken As Long
    Dim mLUID As LUID
    Dim mPriv As TOKEN_PRIVILEGES
    Dim mNewPriv As TOKEN_PRIVILEGES
    hProc = GetCurrentProcess()
    OpenProcessToken hProc, TOKEN_ADJUST_PRIVILEGES + TOKEN_QUERY, hToken
    LookupPrivilegeValue "", "SeShutdownPrivilege", mLUID
    mPriv.PrivilegeCount = 1
    mPriv.Privileges(0).Attributes = SE_PRIVILEGE_ENABLED
    mPriv.Privileges(0).pLuid = mLUID
    ' enable shutdown privilege for the current application
    AdjustTokenPrivileges hToken, False, mPriv, 4 + (12 * mPriv.PrivilegeCount), mNewPriv, 4 + (12 * mNewPriv.PrivilegeCount)
End Sub
 
Private Sub cmdLogoff_Click()
    Dim retval As Long
    retval = ExitWindowsEx(EWX_LOGOFF, 0)
    Unload Me
End Sub
 
Private Sub cmdPoweroff_Click()
    Dim retval As Long
    retval = ExitWindowsEx(EWX_POWEROFF, 0)
    Unload Me
End Sub
 
Private Sub cmdReboot_Click()
    Dim retval As Long
    retval = ExitWindowsEx(EWX_REBOOT, 0)
    Unload Me
End Sub
 
Private Sub cmdShutdown_Click()
    Dim retval As Long
    retval = ExitWindowsEx(EWX_SHUTDOWN, 0)
    Unload Me
End Sub
 
Private Sub Form_Load()
    EnableShutDown
End Sub