如何在PowerShell中将标签的背景设置为透明？

Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

public class TransparentLabel : Label
{
    protected override CreateParams CreateParams
    {
        get
        {
            CreateParams cp = base.CreateParams;
            cp.ExStyle |= 0x20;  // 设置WS_EX_TRANSPARENT样式
            return cp;
        }
    }

    protected override void OnPaintBackground(PaintEventArgs e)
    {
        // 不绘制背景
    }
}
"@

$Form = New-Object System.Windows.Forms.Form
$Form.Size = New-Object System.Drawing.Size(400, 300)

$Label = New-Object TransparentLabel
$Label.Text = "透明标签"
$Label.AutoSize = $true
$Label.BackColor = [System.Drawing.Color]::Transparent
$Label.Parent = $Form

$Form.Controls.Add($Label)

$Form.ShowDialog()