I’m working on a HID filter for a custom digitizer device. UsagePage is digitizer (0xD) but all the usages are 0xff00. This filter works great on XPTE and Vista but on regular XP it fails with code 41 “Windows successfully loaded the device driver for this hardware but cannot find the hardware device”.
I’ve tried both WDM and KMDF flavors of the filter sample but get the same result.
The DriverEntry is called. I’ve kept it very simple, mostly just passes everything through and it returns success. AddDevice is never called. Right after DriverEntry it gets an unload.
Any ideas?
Thanks much for any hints.
-Dan