The second method you can use to register a desktop application is COM interface–based notification. In this method, you use two COM interfaces to register an application in the desktop registry:
Although the COM interface–based notification method is more complex than registry-based notification, by using it you get some control of the connection manager and the ability to register and deregister for connection notifications.
The connection manager, which resides on the desktop, displays an icon next to the clock in the taskbar when the Windows CE–based device is connected or is waiting to be connected to the desktop computer. This icon—two terminals with a connecting cable—indicates the connection status. By right-clicking the icon, you can start Windows CE Explorer.