WinForms:禁用RichTextBox的文本抗锯齿

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

public class RichTextBoxEx : RichTextBox
{
    [DllImport("gdi32.dll")]
    private static extern IntPtr GetDC(IntPtr hWnd);

    [DllImport("gdi32.dll")]
    private static extern int SetGraphicsMode(IntPtr hdc, int iMode);

    [DllImport("gdi32.dll")]
    private static extern int SetPixel(IntPtr hdc, int X, int Y, int crColor);

    protected override void OnHandleCreated(EventArgs e)
    {
        base.OnHandleCreated(e);
        IntPtr hdc = GetDC(Handle);
        SetGraphicsMode(hdc, 1);
        SetPixel(hdc, 0, 0, 0); // 设置一个像素，触发GDI+初始化
    }
}