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From: leafbanana on 6 Dec 2007 00:34
I have developed a class upper filter driver used in "Image" class. It
is for processing video frames that is produced by pc cameras. But I
find there is a system-provided class upper filter driver named
ksthunk.sys already (with Winxp 64bit / WinVista 64bit).

If I put my filter driver after ksthunk in registry, it means when
device loaded ksthunk will be under my filter driver in driver stack.
The problem is every user mode virtual address is invalid! If I put my
filter driver in front of it , things are OK.

I want to know must I put my filter driver in front of ksthunk in
registry?

From: leafbanana on 6 Dec 2007 00:39
In addition, anyone would provide any information about ksthunk.sys?
Thanks.

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