PowerShell events: [2].NET object events (take subscribing and processing Excel events as an example)

The following is a piece of code to subscribe and handle Excel events

 1 Clear-Host
 2 $excel = New-Object -ComObject Excel.Application
 3 $wb = $excel.Workbooks.Add()
 4 $sht = $wb.Worksheets[1]
 5 Register-ObjectEvent -InputObject $excel -EventName SheetChange -SourceIdentifier Excel.SheetChange -Action { 
 6     Write-Host '$Event自动变量拥有的属性：'
 7     $Event | fl | Out-Host
 8     Write-Host [1] ('ComputerName: {0}' -f $Event.ComputerName)
 9     Write-Host [2] $Event .RunspaceId
 10      Write-Host [3] $Event .EventIdentifier
 11      Write-Host [4] $Event .Sender
 12      Write-Host [5] ( $Event .SourceEventArgs -eq  $null )
 13      #No output, it can be seen that although this member exists in the property of $Event, it is inaccessible. Please use $Args instead of 
14      Write-Host [6] ( $Event .SourceArgs -eq  $null )
 15      Write-Host [ 7] $Event .SourceIdentifier
 16      Write-Host [8] $Event .TimeGenerated
 17     Write-Host [9] $Event .MessageData
 18      Write-Host ('-' * 10 )
 19      $Target = $Args [1 ]
 20      Write-Host [1] $Target .Address()
 21      #Read the cell's When setting the value, be sure to use Value2, the original Value property is an object, for some reason 
22      write-host [2] $Target .Value2
 23      Write-Host [3] $Args .Count
 24      Write-Host [4] $Args [ 0 ].Name
 25      # turned out to be $false, I don't know why 
26      Write-Host [5] ( $Args [0] -eq $sht )
 27      #It should return $true, but there is no output, I don't know why 
28      Write-Host [6] ( $Target  -eq  $sht .Range('A1'))
 29      Write-Host [7] $Sender . Name
 30      Write-Host [8] ( $Sender  -eq  $excel )
 31 } -MessageData " SheetChange Event Happened! " | Out- Null
 32  $sht .Cells(1, 1).Value = 'hello'
 33  #Wait for the event Response 
34 Start-Sleep 2
 35  $wb .Close( $false )
 36 $excel.Quit()
37 Unregister-Event Excel.SheetChange

Its execution result is as follows: