[gixxy]

It is quite easy actually. You just extend Button and implement your own get() method to return the limit switch input. Add your own debouncing and you are good.

Here is my code (I haven't implemented any debouncing)

/*
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 * and open the template in the editor.
 */
package edu.wpi.first.frc3946.MyTest;

import edu.wpi.first.wpilibj.DigitalInput;
import edu.wpi.first.wpilibj.buttons.Button;

/**
 *
 * @author Gustave Michel
 */
public class IOButton extends Button {
    DigitalInput button;
    
    public IOButton(int port) {
        button = new DigitalInput(port);
    }
    
    public boolean get() {
        return button.get();
    }
    
}