"James" <jkk***@hotmail.com> wrote in message
news:eQKpSzPFGHA.208@tk2msftngp13.phx.gbl...
> vb.net 2003
>
> i wrote a windows service that does threading. My codes  are
>
> a) the service thread will read a list of machine from a text file
> (machines.txt).
> b) it then logon using the below
> Dim returnValue As Boolean = LogonUser(m_ntid, m_domain, m_pwd,
> LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, tokenHandle)
>
> if returnvalue = true
>
>    do part (c)
>
> else
>
>   write a event log that computers do not exists
>
> end if
>
> c) once logon successful, it will do a wmi search for hotfix
>
> Dim searchstring As String = "SELECT * FROM Win32_QuickFixEngineering
> WHERE HotFixID = " & "'" & m_kbhotfix & "'"
>
> Dim searcher As New ManagementObjectSearcher("\\" + computer +
> "\root\CIMV2", searchstring)
>
> if hotfix is found, then write an event log to my pc that runs the
> services.
>
> It works fine for the following scenarios
>
> 1) the logon id is a administrator of remote machines
>
> I deliberately setup some bogus machines in my machines.txt. By right
> these machines do not exists. However the returnvalue always go to "true",
> which mean "false" machines the thread ignore and do not write any event
> log. How can i check machine exists first or can the code generate some
> try/catch that machines do not exist or i do not have permission ? all i
> want is that returnvalue = false so that my eventlogs can write something
> ?
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