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From: unclepauly on 19 May 2010 08:11
hello,

i have successfuly installed both the kbfiltr and the moufiltr on our test
pc (which is xp). i have installed them both as class-level upper filters.
for the keyboard, i have tried ps/2 and usb and they both seem to be working
fine. for the mouse i have only tried usb but i am assuming(!) ps/2 will work
too.

the way i installed both the filter drivers was a simple two-step process.

1) i went into the registry and modified the
HKLM/SYSTEM/CurrentControlSet/Class/{4Dxxxxx} key, and set the UpperFilters
to "kbfiltr kdbclass". same for mouse.

2) i created a new reg key at HKLM/SYSTEM/CurrentControlSet/Services and
called it kbfiltr. i created the values as below:

Type (dword) : 00000001
Start (dword) : 00000003
ErrorControl (dword) : 00000000
Tag (dword) : 00000006
ImagePath (reg_expand_sz) : system/drivers/kbfiltr.sys
DisplayName (reg_sz) : Keyboard Filter Example
Group (reg_sz) : Keyboard Port

same for mouse, except group is Pointer Port.

after doing a reboot.....everything is fine ! i can see the ServiceCallback
being hit for both mouse and keyboard in dbgview.

so my questions are...is that really all there is to it ?? this works on my
test machine but will be there be any scenarios where doing the above will
not be enough, ie any further steps required ? and secondly, if the above
really is all there is to it, are there any links on how to do this
programatically ?
thank you once again.
From: Doron Holan [MSFT] on 21 May 2010 12:27
that is all you need to do. also, use different service names than the ones
that are shipped in the sample so that you do not collide with someone
else's filter

d

"unclepauly" wrote in message
news:CDD99B73-A670-45E0-9867-E210E652B1C3(a)microsoft.com...

hello,

i have successfuly installed both the kbfiltr and the moufiltr on our test
pc (which is xp). i have installed them both as class-level upper filters.
for the keyboard, i have tried ps/2 and usb and they both seem to be working
fine. for the mouse i have only tried usb but i am assuming(!) ps/2 will
work
too.

the way i installed both the filter drivers was a simple two-step process.

1) i went into the registry and modified the
HKLM/SYSTEM/CurrentControlSet/Class/{4Dxxxxx} key, and set the UpperFilters
to "kbfiltr kdbclass". same for mouse.

2) i created a new reg key at HKLM/SYSTEM/CurrentControlSet/Services and
called it kbfiltr. i created the values as below:

Type (dword) : 00000001
Start (dword) : 00000003
ErrorControl (dword) : 00000000
Tag (dword) : 00000006
ImagePath (reg_expand_sz) : system/drivers/kbfiltr.sys
DisplayName (reg_sz) : Keyboard Filter Example
Group (reg_sz) : Keyboard Port

same for mouse, except group is Pointer Port.

after doing a reboot.....everything is fine ! i can see the ServiceCallback
being hit for both mouse and keyboard in dbgview.

so my questions are...is that really all there is to it ?? this works on my
test machine but will be there be any scenarios where doing the above will
not be enough, ie any further steps required ? and secondly, if the above
really is all there is to it, are there any links on how to do this
programatically ?
thank you once again.

From: unclepauly on 24 May 2010 05:57
thank you i will change the service name.

with regards to making an installer, is the easiest method to write the
service to the registry, to make a reg file and install it that way, if its
always going to be the same (accross xp, vista etc) ? then to prepend the
service i could just 'assume' the UpperFilters is always going to be
mouclass/kbclass and use the registry api's to prepend my service name.
although this could overwrite an existing filter should one already exist.

i am sure there is a more elegant solution though ?
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