Ta ai o codigo coloque em um form isso e teste Const EWX_LOGOFF = 0
Const EWX_SHUTDOWN = 1
Const EWX_REBOOT = 2
Const EWX_FORCE = 4
Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long
Private Sub Form_Load()
msg = MsgBox("Presione OK para Rebotar ou Cancela para sair.", vbCritical + vbOKCancel + 256, App.Title)
If msg = vbCancel Then End
ret& = ExitWindowsEx(EWX_FORCE Or EWX_REBOOT, 0)
End Sub