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How to accord physical device to get usb device

Jehoshua_JJehoshua_J Member Posts: 5

i know some disk such as /??/physicalDevice1 is usb disk ,so i want buil urb request to get device self description to get PID and VID in urb.i try to use IOCTL_STORAGE_QUERY_PROPERTY irp to send disk but the response is wrong . the value is string not PID_XXXX VID_XXXX this who can help me

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