Note that for an application to be restarted when the update requires a computer restart, the installer must call the ExitWindowsEx function with the EWX_RESTARTAPPS flag set or the InitiateShutdown function with the SHUTDOWN_RESTARTAPPS flag set.

  static extern UInt32 InitiateShutdown(

    ' InitiateShutdown

    Friend Shared Function InitiateShutdown( _

    ' used with InitiateShutdown