ProgOb/07_3_NowyButton/NowyButton.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection.Emit;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace _07_3_NowyButton
{
  public class NowyButton : Button
  {
    public event EventHandler Click_LU;
    public event EventHandler Click_LD;
    public event EventHandler Click_RU;
    public event EventHandler Click_RD;

    public NowyButton()
    {
      this.MouseClick += NowyButton_MouseClick;
    }

    private void NowyButton_MouseClick(object sender, MouseEventArgs e)
    {
      if (e.X < this.Width / 2 && e.Y < this.Height / 2)
        Click_LU?.Invoke(this, e);
      else if (e.X < this.Width / 2 && e.Y >= this.Height / 2)
        Click_LD?.Invoke(this, e);
      else if (e.X >= this.Width / 2 && e.Y < this.Height / 2)
        Click_RU?.Invoke(this, e);
      else
        Click_RD?.Invoke(this, e);
    }
  }
}