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How would i install a UMDF2 Device (not class) Filter driver for an existing device.
An inf is not appropriate (being a device filter), so i figure i need to directly add the filter via the registry and power cycle the port
It seems i need to add the LowerFilter (or UpperFilter) REGMULTISZ of WUDFRd and then somehow add values under WUDF key under Device Parameters ? So WUDFRd knows what to do.
Ive tried this but the device would start saying invalid registry entry. There seems to be no documented way to add a UMDF2 Device Filter?
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