Detect mouse click on Desktop, not on figure

I want to detect the left/right mouse click. I know how to do this in a figure. However I need this outside of a figure, on the 'normal' desktop screen.

It guess it should work with Java. To press and release a mouse button in Matlab on the Desktop is simple, but how do I get the information if a mouse button was pressed on the Desktop. I was trying MouseEvent but my Java knowledge is not enough for that.

I have searched a lot on net, but was not successful.

Thanks for help

import java.awt.Robot;
import java.awt.event.*;
import java.awt.event.MouseEvent;
robot = Robot;

% 5s later, move the mouse to point (640,640) where the 'go' button is,
% then click it.
%pause(5);
robot.mouseMove(40, 500);
robot.mousePress(InputEvent.BUTTON1_MASK);
robot.mouseRelease(InputEvent.BUTTON1_MASK);

for i= 1:1000
    pause (0.50)

if MouseEvent.getButton() == MouseEvent.BUTTON1
    & Do somehting here if mouse is clicked.
end
end

Maybe this Java code gives some idea how to implement MouseEvent into Matlab:

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JTextArea;

public class Main extends JFrame {
  public Main() {
    setSize(300, 300);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      final JTextArea textArea = new JTextArea();
      textArea.setText("Click Me!");

      textArea.addMouseListener(new MouseAdapter() {
        public void mouseClicked(MouseEvent e) {
          if (e.getButton() == MouseEvent.NOBUTTON) {
            textArea.setText("No button clicked...");
          } else if (e.getButton() == MouseEvent.BUTTON1) {
            textArea.setText("Button 1 clicked...");
          } else if (e.getButton() == MouseEvent.BUTTON2) {
            textArea.setText("Button 2 clicked...");
          } else if (e.getButton() == MouseEvent.BUTTON3) {
            textArea.setText("Button 3 clicked...");
          }

          System.out.println("Number of click: " + e.getClickCount());
          System.out.println("Click position (X, Y):  " + e.getX() + ", " + e.getY());
        }
      });

      getContentPane().add(textArea);
    }

    public static void main(String[] args) {
      new Main().setVisible(true);
    }
  }

[Kaveh Vejdani]

MouseEvent.getButton() throws an error:

No method 'getButton' with matching signature found for class 'java.awt.event.MouseEvent'.

Please advise. Thanks.