如何在原始的WinForms控件上实现透明的BackColor？

using System;
using System.Drawing;
using System.Windows.Forms;

public class TransparentButton : Button
{
    public TransparentButton()
    {
        // 设置控件的背景色为透明
        BackColor = Color.Transparent;
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        // 绘制控件的外观
        Graphics g = e.Graphics;
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

        // 绘制透明背景
        using (SolidBrush brush = new SolidBrush(Color.FromArgb(128, BackColor)))
        {
            g.FillRectangle(brush, ClientRectangle);
        }

        // 绘制文本
        TextRenderer.DrawText(g, Text, Font, ClientRectangle, ForeColor, TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter);
    }
}