How to call an InputBox using officejs.dialogs

dialog-InputBox.js

InputBox.Reset();
InputBox.Show("What value do you want to enter?",
              "InputBox caption",
              "Default value", function(result) {
                var msg = "";
                if(result.length == 0) {
                  msg = "The user pressed cancel.";
                } else {
                  msg = "The user entered: " + result;
                }
                console.log(msg);
              });