Does anyone know how I can launch the "Safe Removal of Devices" window by

This windows appear when the user i.e. install a USB device (for example, a
memory stick) in an USB port in Win2k or XP. If the user want to disconnect
the USB device he must double-click on the apposite icon on the system tray.
I need, if anyone knows, the command associated with that icon on system
tray. I know only that it's a command like that:
rundll32.exe shell32.dll,......

Thank you.