How to eject volumme on os x?

How to ecject U Disk\'s volume on mac os x. I work on mac os x 10.1. It seems that 10.1 does not support that .But, 10.2 support it ,is it right?Thanks.

Thanks the reply of Mike. I have thought about your way to eject the volume.But I know litte about that.Would u like
tell me more about it.Thanks.

Thanks. I have not the sample code of \"appleUsbKeyboardPro:.would u like tell me how to get it .
Someone tell me that he can eject the volume of \"U disk\" with doing little modification for the code \"VolumeToBSDNode\" . I try it ,but fail.

Is it the sample code in usb_ddK?

[编辑 -  3/21/03 by  MacWin]

Thanks. I have seach the key word of it, but can not find it out.

paranoid: How to get the code of \"appleUsbKeyboardPro\"?thanks.

Thanks u.

I have updated my OS X 10.1 to 10.2 . So , eject the volume is so easy (just one api) . But more bugs found with my program . I will list them after more testing .

[编辑 -  5/22/03 by  MacWin]

The API FSEjectVolmeInfo() can not be supported by Mac OS 10.1 but Mac OS 10.2 do. So I will just call it on 10.2 . But the utility can not work on 10.1.When run it, it shows \"The application MyAP has unexpectedly quit.\"  . Do you known why? Thanks.