C ＃ WinForm listview control has no scroll bar and has written an extension control by itself

using System;

using System.Collections.Generic;

using System.Text;

using System.Windows.Forms;

namespace PosCommonCls

{

    public class ListViewEx : ListView

    {

        //public delegate void ScrollEventHandler(object sender, EventArgs e);

        public event EventHandler HScroll;

        public event EventHandler VScroll;

        public ListViewEx()

        {

        }

        const int WM_HSCROLL = 0x0114;

        const int WM_VSCROLL = 0x0115;

        protected override void WndProc(ref Message m)

        {

            if (m.Msg == WM_HSCROLL)

            {

                OnHScroll(this, new EventArgs());

            }

            else if (m.Msg == WM_VSCROLL)

            {

                OnVScroll(this, new EventArgs());

            }

            base.WndProc(ref m);

        }

        virtual protected void OnHScroll(object sender, EventArgs e)

        {

            if (HScroll != null)

                HScroll(this, e);

        }

        virtual protected void OnVScroll(object sender, EventArgs e)

        {

            if (VScroll != null)

                VScroll(this, e);

        }

    }

}

Only events can be triggered here , Unfortunately, there is no way to return the specific dragged value , I need to deal with it myself