Re: can't delete USB registry items...
From: cristalink (cristalink_at_nospam.nospam)
Date: 02/22/05
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Date: Wed, 23 Feb 2005 11:53:50 +1300
> I've found that reg.exe can even delete these items, at least once I've
> changed the permissions for Everyone; is there some way I can either get
> source code for reg.exe, or at least find out how it is doing this??
RegDeleteKey cannot delete a key with subkeys. Try SHDeleteKey instead or
call RegDeleteKey recursively.
-- http://www.firestreamer.com - NTBackup to DVD and DV "Daniel Miller" <gorlash@community.nospam> wrote in message news:Xns960595E7EDB68dancarddupercom@207.46.248.16... >I suspect that this is not quite the correct group for this question. > Unfortunately, it is the only MSDN Managed group which is related to the > DDK, so I'm stuck here; I hope someone from MS will assist me. > > My specific issue that I have is this: we have a USB tester which can > operate on 12 USB devices at a time. Typically the user will start with > a raw part which will have vendor/product ID, but no other internal data. > They then perform a low-level format on the part, which assigns a device > serial number and other SCSI data. The problem is this: > > Every time a USB device is inserted in a Windows machine, several > registry entries are created... at a minimum, there are: > > HLKM:SYSTEM\CurrentControlSet\Enum\USB entries > HLKM:SYSTEM\CurrentControlSet\Enum\USBSTOR entries > HLKM:SYSTEM\CurrentControlSet\Control\DeviceClasses\{deviceClassGUID} > entries > > and several others. Each of these is hundreds of bytes in size. > > This will create one set of data before the low-level format, and > *another* full set after the format, because the device now is recognized > by its serial number instead of its physical address. > > Now, this is all just for ONE device. In a fully-operational production > environment, the user can put 15000 parts/day through the machine. > > Just think of what the registry will look like after a week or two of > this, let alone a couple of years... the machine quickly starts slowing > down, and we know that eventually, when the registry gets too bloated, > Windows just stops functioning. > > So I need to develop some method of stripping out old registry entries, > once I manage to determine all of the entries that I need to be concerned > about. I tried doing this with the registry management functions, > including either SHDeleteKey or RegDeleteKey, but I have two sets of > problems with this; the first is permissions, the second is that even > after I change the permissions, the delete-key functions still fail, > though I can manually delete the keys using RegEdit. > > I've found that reg.exe can even delete these items, at least once I've > changed the permissions for Everyone; is there some way I can either get > source code for reg.exe, or at least find out how it is doing this?? > > Dan Miller >
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