B4J Code Snippet Running PowerShell scripts

Public Sub PowerShellScript(s As String) As ResumableSub
    s = s.Replace(CRLF, ";").Replace("""", "'")
    Dim shl As Shell
    shl.InitializeDoNotHandleQuotes("shl", "powershell.exe", Array("-Command", s))
    shl.Run(-1)
    Wait For shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)
    Dim res As ShellSyncResult
    res.ExitCode = ExitCode
    res.StdErr = StdErr
    res.StdOut = StdOut
    res.Success = Success
    If StdErr <> "" Then
        Log(StdErr)
        If ExitCode = 0 Then res.ExitCode = 1
    End If
    Return res
End Sub

Sub Button1_Click
    TakeScreenshot(File.Combine(File.DirApp, "1.png"), MainForm.WindowLeft, MainForm.WindowTop, _
        MainForm.WindowLeft + MainForm.WindowWidth, MainForm.WindowTop + MainForm.WindowHeight)
End Sub

Public Sub TakeScreenshot (OutputFile As String, Left As Int, Top As Int, Right As Int, Bottom As Int)
    Dim script As String = $"
  
    [Reflection.Assembly]::LoadWithPartialName("System.Drawing")
function screenshot([Drawing.Rectangle]$bounds, $path) {
   $bmp = New-Object Drawing.Bitmap $bounds.width, $bounds.height
   $graphics = [Drawing.Graphics]::FromImage($bmp)

   $graphics.CopyFromScreen($bounds.Location, [Drawing.Point]::Empty, $bounds.size)

   $bmp.Save($path)

   $graphics.Dispose()
   $bmp.Dispose()
}

$bounds = [Drawing.Rectangle]::FromLTRB(${Left}, ${Top}, ${Right}, ${Bottom})
screenshot $bounds "${OutputFile}"
    "$
    Wait For (PowerShellScript(script)) Complete (Result As ShellSyncResult)
    If Result.ExitCode = 0 Then
        PowerShellScript(OutputFile) 'show the screenshot
    End If
End Sub

PowerShellScript($"rundll32.exe user32.dll,LockWorkStation"$)