Vista - Check for installed updates programmatically

Hello.
Is there a good way of finding out if a HotFix update is installed on
a user's machine?

I need to know on install time if this hot fix is installed or not. I
know the hotfix appears in the Add Remove Programs , and therefore i
assumed there's a registry entry for it. It seems like its not as easy
as i hoped: I found it under:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
\Component Based Servicing\PackageDetect\Microsoft-Windows-Foundation-
Package~31bf3856ad364e35~x86~~0.0.0.0]

But to enumerate that key for the specific hotfix that i'm looking for
seems like not the right approach.

Any ideas?

"om" <omagen@xxxxxx> wrote in message
news:27cfd5c7-be6d-47d6-ac4e-e4176c02ba11@xxxxxx
Go to Control Panel > Windows Update > View Update History and check for
your updates. Hotfixes are included if you did any.
--
BobF.
Lincoln actually got it right but was way ahead of his time when he said,
"You can have some of you computer working all of the time and all of your
computer working some of the time but..." It was he that said that, wasn't
it?

On Feb 28, 12:10 pm, om <oma...@xxxxxx> wrote:I am using wusa.exe to run this hotfix on machines that need it - i
just cant find enough documentation about the return codes from
wusa.exe. Maybe there is a return code saying "already installed" or
something in that nature.

systeminfo > list.txt
find "123456" list.txt

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Mark L. Ferguson

..
"om" <omagen@xxxxxx> wrote in message
news:54438995-f84f-4dd0-90f1-1b58045db822@xxxxxx

On Feb 28, 12:19 pm, "Bob F." <b...@xxxxxx> wrote:Bob, thank you - I'm aware of that, but i need this programmatically.

"cscript get update history.vbs"

--Get update history.vbs--
Set objSession = CreateObject("Microsoft.Update.Session")
Set objSearcher = objSession.CreateUpdateSearcher
intHistoryCount = objSearcher.GetTotalHistoryCount

Set colHistory = objSearcher.QueryHistory(1, intHistoryCount)

For Each objEntry in colHistory
Wscript.Echo "Operation: " & objEntry.Operation
Wscript.Echo "Result code: " & objEntry.ResultCode
Wscript.Echo "Exception: " & objEntry.Exception
Wscript.Echo "Date: " & objEntry.Date
Wscript.Echo "Title: " & objEntry.Title
Wscript.Echo "Description: " & objEntry.Description
Wscript.Echo "Unmapped exception: " & objEntry.UnmappedException
Wscript.Echo "Client application ID: " & objEntry.ClientApplicationID
Wscript.Echo "Server selection: " & objEntry.ServerSelection
Wscript.Echo "Service ID: " & objEntry.ServiceID
i = 1
For Each strStep in objEntry.UninstallationSteps
Wscript.Echo i & " -- " & strStep
i = i + 1
Next
Wscript.Echo "Uninstallation notes: " & objEntry.UninstallationNotes
Wscript.Echo "Support URL: " & objEntry.SupportURL
Wscript.Echo
Next
--end file--
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Mark L. Ferguson

..
"om" <omagen@xxxxxx> wrote in message
news:54438995-f84f-4dd0-90f1-1b58045db822@xxxxxx

"om" <omagen@xxxxxx> wrote:[...]
It's a bit indirect but depending on how you're writing the process that
needs this information, you can use WMIC. If the correct form of the hotfix
name is KB123456, the command:

WMIC QFE WHERE HOTFIXID='KB123456'

will produce a zero-length SYSERR output if KB123456 is present. If
KB123456 is not present, the command will produce a 6-byte SYSOUT string.

This is a hack; if you're using wscript the code suggested by Mark Ferguson
elsewhere in the thread would be a better choice...or consider using
PowerShell if you can assume that it's installed on the systems on which
your program will run.

Joe Morris