Re: show me installed filter drivers

There is no such tool. You can write one to find out all the device and
class filters loaded in the system. But before I tell you how do to get that
info I would like to know why you need it.

--
-Eliyas
This posting is provided "AS IS" with no warranties, and confers no rights.
http://www.microsoft.com/whdc/hwdev/driver/kb-drv.mspx
"Paul Attryde" <> wrote in message
news:%...
> Is there a tool or utility out there that will show me all the installed
> filter drivers on my machine?
>
> TIA,
> Paul
>

DeviceTree from OSR can do this (doesn't come with source though).

Eliyas Yakub [MSFT] wrote:

> There is no such tool. You can write one to find out all the device and
> class filters loaded in the system. But before I tell you how do to get that
> info I would like to know why you need it.
>

--
- Nick Ryan (MVP for DDK)

An IRP is basically a parameter list used when one driver (or the OS) calls
another driver. Typical IRPs are for open (create), close, read, write, power
events ... Or you might think of an IRP as a work element or a request for work to
be done. The called routine will effect the IRP immediately (possibly indicating
an error) or will do it someday.

Paul Attryde wrote:

> what is an IRP anyway?

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If replying by e-mail, please remove "nospam." from the address.

James Antognini
Windows DDK MVP

OK, that makes sense.
Thanks James

James Antognini spoke thusly on 8/6/2003 11:09:
> An IRP is basically a parameter list used when one driver (or the OS) calls
> another driver. Typical IRPs are for open (create), close, read, write, power
> events ... Or you might think of an IRP as a work element or a request for work to
> be done. The called routine will effect the IRP immediately (possibly indicating
> an error) or will do it someday.
>
> Paul Attryde wrote:
>
>
>>what is an IRP anyway?
>
>
> --
> If replying by e-mail, please remove "nospam." from the address.
>
> James Antognini
> Windows DDK MVP
>
>

if your keyboard is a ps2 device, then there is most definitely a filter
driver involved in getting all of the extra features working. to install a
device driver like this, they usually went through an INF install. look in
device manager and under the properties for the keyboard, click on the
driver tab and then the Driver Details button. the 2 expected drivers are
i8042prt.sys and kbdclass.sys. anything else is a filter.

--
This posting is provided "AS IS" with no warranties, and confers no rights.
"Paul Attryde" <> wrote in message
news:...
> Eliyas Yakub [MSFT] spoke thusly on 8/6/2003 10:30:
> > There is no such tool. You can write one to find out all the device and
> > class filters loaded in the system. But before I tell you how do to get
that
> > info I would like to know why you need it.
> >
>
> Because I'm having some problems with a point of sale keyboard that has
> extra capabilities (magswipe, updateable firmware etc), and I suspect
> the vendor installs a keyboard filter driver in order to make the magic
> happen.
>
> Of course, they may be doing something else entirely - although I've
> been lurking here for quite a while I still don't know the first thing
> about drivers (what is an IRP anyway?), so even if was able to determine
> that they're using a filter driver there's really not a lot I could do
> with that knowledege anyway.
>
> Paul
>

if your keyboard is a ps2 device, then there is most definitely a filter
driver involved in getting all of the extra features working. to install a
device driver like this, they usually went through an INF install. look in
device manager and under the properties for the keyboard, click on the
driver tab and then the Driver Details button. the 2 expected drivers are
i8042prt.sys and kbdclass.sys. anything else is a filter.

--
This posting is provided "AS IS" with no warranties, and confers no rights.
"Paul Attryde" <> wrote in message
news:...
> Eliyas Yakub [MSFT] spoke thusly on 8/6/2003 10:30:
> > There is no such tool. You can write one to find out all the device and
> > class filters loaded in the system. But before I tell you how do to get
that
> > info I would like to know why you need it.
> >
>
> Because I'm having some problems with a point of sale keyboard that has
> extra capabilities (magswipe, updateable firmware etc), and I suspect
> the vendor installs a keyboard filter driver in order to make the magic
> happen.
>
> Of course, they may be doing something else entirely - although I've
> been lurking here for quite a while I still don't know the first thing
> about drivers (what is an IRP anyway?), so even if was able to determine
> that they're using a filter driver there's really not a lot I could do
> with that knowledege anyway.
>
> Paul
>