need simple sample program notify when a usb device plugged

[parrot]

hi! 
i want to write an application that will notify me that a specific usb deviced was plugged to the computer.
I'm new to programming and the only thing that i succeeded so far was to get WM_DEVICECHANGE message.
I read in the internet that when a usb is plugged and i get the WM_DEVICECHANGE message the wParam should be
DBT_DEVICEARRIVAL, but when i check it's value - it always 7 - both in plug and unplug the usb.
How can i overcome this so tha the app will notify me if the usb was plugged or unplugged?

[Jan Axelson]

See my example code:

http://www.lvr.com/hidpage.htm#MyExampleCode

http://www.lvr.com/winusb.htm

Jan