In all cases UsbTreeView just performs the system call and shows a But the latter of course restarts all devices attached to Such a device cannot be reactivated alone.Ī reactivation is possible by restarting the port or the whole hub it isĪttached to.
#Wpd viewer code#
Which works without admin previleges but leads to problem code 47 which In this case CM_Request_Device_Eject is called UsbTreeView does if you select "Restart device".īut CM_Query_And_Remove_SubTree needs admin previleges, otherwise it fails A code 21 device can be reactivatedīy performing a DIF_PROPERTYCHANGE class installer call. On success the device has the problem codeĢ1 which is CM_PROB_WILL_BE_REMOVED. On Safe Removal UsbTreeView first calls the configuration management callĬM_Query_And_Remove_SubTree. Some device"s hid descriptor can be read under NT6 but not under NT5. Seen it depends alone on the device but another user reported that
Returns ERROR_GEN_FAILURE or ERROR_INVALID_PARAMETER.
#Wpd viewer windows#
Then please let me know, maybe I find the right specification documentįor an unknown reason HID descriptors often cannot be read, Windows
So, if you have an unknown descriptor and the interface class is not 0xFF the device"s InterfaceClass is 0xFF (vendor specific), so class specificĭescriptors cannot be decoded since their class is unknown There are two reasons why decriptors cannot be decoded and therefore R:filename write (silently) a report to filename
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