Boguslaw Brandys' CPL Applet (Poland) contains a TCPLApplet object with a visual mirror that allows you to organize your application as a control panel applet. In short, this is a way to put a shortcut to your application in the Control Panel, among other system settings. It is unlikely that you will need to do this for a regular application, but if you write any driver or system utility, then keep this possibility in mind.