private void jMenuItem3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItem3ActionPerformed
    //Open help file (write help file...)
        Desktop dt = Desktop.getDesktop();
        try
        {
            dt.open( new File("help.txt") );
        } catch (IOException e) {//exception handling?
            }
    }//GEN-LAST:event_jMenuItem3ActionPerformed