NDIS IM & NdisMDeregisterDevice

As I know, i should call NdisMDeregisterDevice in MiniportHalt routine
when last miniport is halted (
http://groups.google.ru/group/comp.os.ms-windows.programmer.nt.kernel-mode/browse_thread/thread/1d8ee27725dd24c2/b8e565e360364c61?lnk=st&q=NdisMDeregisterDevice+Unload&rnum=1&hl=ru#b8e565e360364c61)
Then my driver will be unloaded. But if client app has opened handle on
my device, driver is still in memory. I can understand why. When app
close the last handle i suggest calling driver Unload routine, but
driver is still referenced. I can notify app about stop, but I think
when app handle such notify it will be late. What sould I do?

.

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