C# -更改复选框中复选标记的颜色

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

public class CustomCheckBox : CheckBox
{
    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);

        // 获取复选框的边界矩形
        Rectangle boxRect = new Rectangle(0, 0, 16, 16);

        // 获取复选框的复选标记矩形
        Rectangle checkRect = new Rectangle(3, 3, 10, 10);

        // 绘制复选框的背景
        ControlPaint.DrawCheckBox(e.Graphics, boxRect, this.Checked ? ButtonState.Checked : ButtonState.Normal);

        // 绘制复选框的复选标记
        if (this.Checked)
        {
            using (SolidBrush brush = new SolidBrush(Color.Red)) // 设置复选标记的颜色为红色
            {
                e.Graphics.FillRectangle(brush, checkRect);
            }
        }
    }
}