DeviceIOView allows you to watch the data transfer between a software or service and a device driver (DeviceIoControl calls). For each call to a device driver, the following information is displayed: Handle, Control Code, number of input bytes, number of output bytes, the name of the device handle, and all the input/output bytes, displayed as Hex dump.
This utility works on Windows 2000, Windows XP, Windows Server 2003, and Windows Vista (32-bit only). Older versions of Windows are not supported.
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