Question

I want a JPanel with conrols to be pop-up ed from windows taskbar when My application started

Answer 1

It seems to me that you want a JDialog with controls to be popped up, since JPanel is not a top level container. Add a window listener to your top-level container (JFrame). It is fairly easy to implement your openMyControlsDialog(…) method:

addWindowListener(new java.awt.event.WindowAdapter() {
    public void windowOpened(java.awt.event.WindowEvent evt) {
        openMyControlsDialog(evt);
    }
});

I do not quite understand what you mean when you write “from taskbar”. Don’t all programs pop up from the task bar?