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

namespace TBAppraisalTools.重绘
{
    class MyPictureBox : PictureBox
    {
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == 0x0014) // 禁掉清除背景消息
                return;
            base.WndProc(ref m);
        }
        protected override CreateParams CreateParams
        {
            get
            {
                var parms = base.CreateParams;
                parms.Style &= ~0x02000000; // Turn off WS_CLIPCHILDREN 
                return parms;
            }
        }
    }
}