Dim extArchiver As New System.Diagnostics.Process()
With extArchiver.StartInfo
   .FileName = "pfad_und_dateiname_der_anwendung"
   .WorkingDirectory = "pfad_zur_anwendung"
   .Arguments = "argumente"
   .WindowStyle = ProcessWindowStyle.Hidden
   .UseShellExecute = False
   .LoadUserProfile = False
   .CreateNoWindow = True
   .Domain = "domäne"
   .UserName = "benutzer"
   .Password = SecurePWD("kennwort") 'Funktion zum Verschlüsseln des 
   ' SecureStrings
End With
extArchiver.Start()