c#拦截关机注销消息的实现代码

private static int WM_QUERYENDSESSION = 0x0011;
private static bool systemShutdown =false;
private static bool IsselfClose =false;
private IntPtr _lp;
       
protected override voidWndProc(refSystem.Windows.Forms.Message m)
{
    if (m.Msg == WM_QUERYENDSESSION)
    {
        if (!IsselfClose)
        {
            systemShutdown = true;
            _lp = m.LParam;
        }
    }
    base.WndProc(refm);
} //WndProc

private voidFormSetting_FormClosing(objectsender,FormClosingEventArgs e)
{
   if (systemShutdown)
   {
      e.Cancel= true;
      systemShutdown= false;
      WriteLogwl = new WriteLog(_LogPath,_UserName,_lp.ToInt32());
      wl.Show();
   }
}