Re: data exchange betwen driver and gui aplication

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rc =ObReferenceObjectByHandle
(
UserProcessHandleEvent,
GENERIC_ALL,
NULL,
KernelMode,
(PVOID *)&ProcessEvent,
0
);

Use Irp->RequestorMode instead of KernelMode and *ExEventObjectType as Type,
otherwise, you will open the security hole.

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@xxxxxxxxxxxxxxxx
http://www.storagecraft.com

.

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