NetBeans plugin

Hi all,
        Could anyone please tell me how to use topcomponent for a plugin
that uses JFrame.I have done a scientific calculator but I'm not able to
convert it to plugin.
                    My main class uses JFrame on which other components are
laid using netbeans GUIEditor.When i create a module using the same It
simply doesnt appear when I click on the Icon meant for it.When browsed I
saw something called as TopComponent.Is it wat I'm supposed to use for this
case?Can't NetBeans communicate with a module that uses JFrame as its parent
window?

Please somebody come forward and reply for the same.

Thanks in advance,
-Rajath Shanbag