Why my device USB LocationInformation value is different with Win XP on Win Vista?

Hi Sir,

Now, we encounter a problem once we have installed our drivers of USB devices.
Our is a composite USB device. After we installed the drivers from the host for it on Win Vista, we check the LocationInformation value to the registry [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\Vid_xxxx & Pid_xxxx & MI_xx\6 & 22884364 & 0 & 0000].
We found that the value of it is '0000.001d.0007.003.000.000.000.000.000 '. It's different with the value that we put in our USB device.
But on Win XP this value is identical to the value that we put in our USB device. Why this difference? And what is the average of the Vista LocationInformation value?
Thank you!
Kony

Hi, Joseph Kony.

http://msdn.Microsoft.com/en-us/library/ms806396.aspx

The beginning or the beginning of the answer is that the Windows XP drivers work in kernel mode and drivers Vistan and Win 7 processor user mode. Thus, each needs different informatrion to set the os driver for the system behavior. See the link above for some detalid. See the drivers for Vista or Win 7 for more information on user-mode drivers.

Hope that helps.
Tom

Tags: Windows

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