Hello guys,
I’ve written WDM mouse filter driver for Windows2000 using Crt2Cap as
prototype. Additionaly I’ve implemented putting “mousestrokes” in as though
the mouse as been moved. I used technique described a lot of times in news
and in MS’ sample JOYFLT - I am just pending the IRP_MJ_READ that comes from
USER, then I create my own Irp (IRP_MJ_READ) to pass it to lower driver and
so on.
Everything works fine. I can dynamicaly attach additional USB mouses in
system and filter driver works correctly with multiple mouses. The
difficulty appears when I dynamicaly detach USB mouse at once after my
IRP_MN_SURPRISE_REMOVAL handler - I have such an impression that system is
deadlocked somehow, because it does not react on mouse, keyboard and so
on…
In debugger I tracked that deadlock occures in IopNotifyTargetDeviceChange
routine.
What’s wrong. What should I do to avoid this problem?
Thanks.
Bye,
Sab
Bye,
Sab