Eject a Removable USB drive

Rickey, Kyle W Kyle.Rickey at bakerhughes.com
Mon Mar 9 19:39:17 CET 2009

Hello everyone,


I would like to be able to eject a usb drive based on drive letter. I've
done a bit of googling and came across the CM_Request_Device_Eject
function on MSDN (http://msdn.microsoft.com/en-us/library/ms790831.aspx)


However, I am not quite sure how to supply the necessary parameter to
the function (dnDevInst).  Does it have anything to do with:




I'm kind of thinking that I have to get some handle to my removable
drive and then go up the device tree using CM_Get_Parent

(http://msdn.microsoft.com/en-us/library/ms791198.aspx) and then call
CM_Request_Device_Eject on the appropriate node.


I am on the right track with this? Any help would be greatly


-Kyle Rickey

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