BotToken = "523b5b25ed27e6ec-111111111111111-2222222222222222";
  UserID = "d3jxe1111111111jYGgZg==";
  
  ButtonArray = New Array;
  
  ButtonArray.Add("Button 1");
  ButtonArray.Add("Button 2");
  ButtonArray.Add("Button 3");
  
  Keyboard = OPI_Viber.CreateKeyboardFromArrayButton(ButtonArray);
  
  Response = OPI_Viber.SendTextMessage(BotToken, "Hello", UserID, False, Keyboard); //Map
  Response = OPI_Tools.JSONString(Response); //JSON string