protected override void WndProc(ref Message msg)
{
        const int WM_SYSCOMMAND = 0x0112;
        const int SC_CLOSE = 0xF060;  
  
         if (msg.Msg == WM_SYSCOMMAND && ((int)msg.WParam == SC_CLOSE))
         {
                 // 点击winform右上关闭按钮
                 // 加入想要的逻辑处理



                 return;//阻止了窗体关闭
         }
         base.WndProc(ref msg);
}