PowerShell Function to query each service and show the start time from the associated process

Get-ServiceUpTime.ps1

function Get-ServiceUpTime
{       	
	[CmdletBinding()]
	param 
    (
		# Name of Computer(s) to query
		[Parameter(Mandatory = $false,
				   Position = 1,				   
				   ValueFromPipelineByPropertyName = $true)]
		[string[]]$ComputerName = $env:COMPUTERNAME,
		# Service Name of the Service(s) to query

		[Parameter(Mandatory = $false,
				   Position = 2,
				   ValueFromPipeline = $true,
				   ValueFromPipelineByPropertyName = $true)]
		[string[]]$ServiceName = '%',
		
        # Show 'STOPPED' Service details
		[Switch]$ShowStopped = $false		
	)

	Process
	{				
		$compID = 0
		
        # Loop each Computer specified in params
		foreach ($comp in $ComputerName)
		{
			try
			{		
				#get ALL processes from the computer - So much quicker than running a seperate query to WMI for each ProcessID found in $wmiService
				$wmiProcess = Get-WmiObject -Query 'SELECT __Server, Name, CreationDate, ProcessID from Win32_Process' -ComputerName $comp -ErrorAction Stop | Sort-Object -Property ProcessID
			}
			catch
			{
				Write-Warning -Message "Unable to retrieve WIN32_Process data from computer: $($comp.ToUpper())"
			}
			
			foreach ($pattern in $ServiceName)
			{
				try
				{
					#replace '*' wildcard character with '%' for WMI query
					$wqlPattern = $pattern -replace '\*', '%'
					
					$wmiService = Get-WmiObject -Query "SELECT Name, ProcessID from Win32_Service WHERE Name LIKE '$wqlPattern'" -ComputerName $comp #-ErrorAction SilentlyContinue
					
					if ($wmiService)
					{
						$svcID = 0
						# Loop each Service found that matches the pattern
						foreach ($svc in $wmiService)
						{
							$match = $false
							$processID = $svc.ProcessID
							
							#filter any services that have no PID: unless -ShowStopped
							if ($processID -ne 0 -or $ShowStopped)
							{
								$procID = 0
								
								#loop until we find a Process mathcing the Service PID
								while (!$match)
								{
									$proc = $wmiProcess[$procID]
									
									### Fix so that loops exits when 1st match found
									if ($proc.ProcessId -eq $processID)
									{
										$match = $true
										
										if ($processID -ne 0)
										{
											$creationDate = $proc.ConvertToDateTime($proc.CreationDate)
											$currentUpTime = (Get-Date) - $creationDate
										}
										Else
										{
											[datetime]$creationDate = 0
											[timespan]$currentUpTime = 0
										}
										
										$objProps = @{
											#'Computer' = $proc.__Server
											'Service' = $($svc.Name)
											'Process' = $proc.Name
											'PID' = $processID
											'StartedDate' = $creationDate
											'CurrentUpTime' = '{0:d\.hh\:mm\:ss}' -f $currentUpTime
										}
										
										$obj = New-Object -TypeName PSObject -Property $objProps
										$obj.psobject.typenames.insert(0, 'Coeus.Healthcheck.ServiceUpTime')
										Write-Output -InputObject $obj
									}
									$procID += 1
								}
							}
							$svcID += 1
						} #/foreach svc
					} #/if wmiservice
				} #/try
				catch
				{
					Write-Warning -Message "Unable to retrieve data from computer: $($comp.ToUpper()) when searching for service(s): $($pattern.ToUpper())"
					$procID = 0
				}
			} #/foreach pattern
			$compID += 1
		} #/foreach comp
	} #/PROCESS
}

# Example
Get-ServiceUpTime | sort currentuptime | ft -Property PID, Service, Process, StartedDate, currentuptime