JNA FindWindowEx Нажать кнопку, поставить галочку и.т.д

HWND hwnd = User32.INSTANCE.FindWindow(null, "Installer Language");
                if (hwnd == null) {
                    JOptionPane.showMessageDialog(null, "WinDjView is not running");
                } else {
                    User32.INSTANCE.ShowWindow(hwnd, 9);
                    User32.INSTANCE.SetForegroundWindow(hwnd);
                }

public class SampleForm extends JFrame {
    private JButton clickMeButton;
    private JPanel rootPanel;
 
    int WM_LBUTTONDOWN = 0x0201;
    int WM_LBUTTONUP = 0x0202;
 
    public static interface User32 extends StdCallLibrary
    {
        final User32 instance = (User32) Native.loadLibrary ("user32", User32.class);
        HWND FindWindowExA(HWND hwndParent, HWND childAfter, String className, String windowName);
        HWND FindWindowA(String className, String windowName);
        WinDef.LRESULT SendMessage(HWND hWnd, int Msg, WinDef.WPARAM wParam, WinDef.LPARAM lParam);
 
    }
 
 
    public SampleForm() {
        super("Hello World");
 
 
 
        setContentPane(rootPanel);
 
        pack();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        clickMeButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
 
 
                HWND hwndShell = User32.instance.FindWindowA(null, "Installer Language");
                HWND hWnd = User32.instance.FindWindowExA(hwndShell, null, null, "Cancel");
                
                com.sun.jna.platform.win32.User32.INSTANCE.ShowWindow(hwndShell, 9);
                com.sun.jna.platform.win32.User32.INSTANCE.SetForegroundWindow(hwndShell);
                
                User32.instance.SendMessage(hWnd, WM_LBUTTONDOWN, null, null);
                com.sun.jna.platform.win32.User32.INSTANCE.PostMessage(hWnd, WM_LBUTTONUP, null, null);
                
                if (hWnd == null) {
                    JOptionPane.showMessageDialog(null, "WinDjView is not running");
                } else {
                    System.out.println("YEAH");
                }
            }
        });
 
        setVisible(true);
 
 
    }
}