Any ideas?

trap {$_;$Script:WMIWorks = $False; Write-Host "Value of WMITest: $WMIWorks";continue}
$ComputerName = ""
$Error.Clear()
$ConnectionOptions = new-object System.Management.ConnectionOptions
$EnumerationOptions = new-object System.Management.EnumerationOptions
$timeoutseconds = new-timespan -seconds 10
$EnumerationOptions.set_timeout($timeoutseconds)
$assembledpath = "\\" + $computername + "\root\cimv2"
$Scope = new-object System.Management.ManagementScope $assembledpath, $ConnectionOptions
$Scope.Connect()
$querystring = "SELECT * FROM Win32_NetworkAdapterConfiguration"
$query = new-object System.Management.ObjectQuery $querystring
$searcher = new-object System.Management.ManagementObjectSearcher
$searcher.set_options($EnumerationOptions)
$searcher.Query = $querystring
$searcher.Scope = $Scope
$WMIWorks = $True
$AdapterDetails = $Searcher.Get()
#IF the WMI call times out, this IF statement and ELSE statement get ignored. I don't know why.
If ($WMIWorks -eq $False)
{
Write-Host "We will do lots of things differently"
# We might do a DNS lookup
# We might ping the host
# We may change where where we write the out put to
# We might write this to a different spread sheet in excel and color it red
}
Else
{
$AdapterDetails
Write-Host "We will do things as planned"
#Write the out put to Excel and color code it green
}
Write-Host "Value of WMI Test is: $WMIWorks"

$querystring = "SELECT * FROM " + $class + $(if ($filter) {" WHERE $filter"})

foreach ($comp in (get-content c:\computers.txt))
{
get-wmicustom -class win32_logicaldisk -namespace "root/cimv2" – computername $comp
}

This is cool and seems to work well for single queries. As a Powershell novice I'm trying to figure out how I can make it work in a script that reads computer names from a CSV file and queries the space on the C: partition via your function (which I modified quickly to add a filter, which does work). I tried the following code but it returns errors like 'Exception calling "Connect" with "0" argument(s): "The RPC server is unavailable."' I guess this means the computer names aren't being read in properly. Any idea how to make this work? Thanks so much!

Function Get-WmiCustom([string]$computername,[string]$namespace,[string]$class,[int]$timeout=15)
{
$ConnectionOptions = new-object System.Management.ConnectionOptions
$EnumerationOptions = new-object System.Management.EnumerationOptions

$timeoutseconds = new-timespan -seconds $timeout
$EnumerationOptions.set_timeout($timeoutseconds)

$assembledpath = "\\" + $computername + "\" + $namespace
#write-host $assembledpath -foregroundcolor yellow

$Scope = new-object System.Management.ManagementScope $assembledpath, $ConnectionOptions
$Scope.Connect()

$querystring = "SELECT * FROM " + $class + " where DriveType=3 AND DeviceID='C:'"
#write-host $querystring

$query = new-object System.Management.ObjectQuery $querystring
$searcher = new-object System.Management.ManagementObjectSearcher
$searcher.set_options($EnumerationOptions)
$searcher.Query = $querystring
$searcher.Scope = $Scope

trap { $_ } $result = $searcher.get()

return $result
}

$csv = "machines.csv"

$import = Import-CSV $csv

$import | foreach {
get-wmicustom -class win32_logicaldisk -namespace "root\cimv2" -computername {$_.hostname} | Select SystemName,DeviceID,VolumeName,@{Name="size(GB)";Expression={"{0:N1}" -f($_.size/1gb)}},@{Name="freespace(GB)";Expression={"{0:N1}" -f($_.freespace/1gb)}}
}

try changing
trap { $_ } $result = $searcher.get()

to
trap { $_; continue } $result = $searcher.get()

I'm writing script for collecting network adapters data using WMI.
I tried to use your great code (ooh, that 10 000 000 days timeout was a someone's crazy idea… ), but have faced some problems.
The code works well if queried computer is either available or totally offline. If it is online but do not returns WMI object properly, I have PowerShell totally crashed with the message "An error has occurred that was not properly handled. Addidtional information is shown below. The Windows PowerShell process will exit". After that PowerShell console closing… Do you have any idea how to fix such behaviour?

I am using such function call: get-wmicustom -class win32_networkadapterconfiguration -namespace "root\cimv2" -computername sunset -timeout 10
Crash occurs when executing $result = $searcher.get() reaching timeout.

Thank you very much.