Eject a USB device

I would Like to eject a USB device from C#, I have the Drive Letter and have found a function in Kernel32.dll (CM_Request_Device_Eject) that can , if provided with an InstanceHandle, request that the USB device is removed.

I have found the UsbEject sample on Code Project on the net but that is dependent on loading the entire device tree into memory and then retrieving that way, I am looking for a/some functions that given a drive letter will return me a InstanceHandle.

If anyone has solutions that differ to the above I would also be interested
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Make the last column not sizeable and Force it to always stretch to the end of the grid.
Sorry about that wrong post,  But im looking for your answer right now :-)
This is another code project sample.

More to come

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